ISRO Scientist or Engineer Electronics 2011

ISRO Scientist or Engineer Electronics 2011 - Question 1

Report

In an amplitude modulated system if the total poweris 600W and the power in the carrier is 400W,the modulation index is

A

-0.5

B

0.75

C

0.9

D

1

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 2

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The channel capacity under the Gaussian noise environment for a discrete memoryless channel with a bandwidth of 4MHz and SNRof31 is.

A

20 Mbps

B

4 Mbps

C

8 kbps

D

4 kbps

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 3

Report

In satellitecommunication, frequency modulation is used becausesatellite channel has

A

High modulation index

B

Small bandwidth and negligible noise

C

Large bandwidth and severe noise

D

Maximum bandwidth and minimum noise

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 4

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For a 3-um-diameteroptical fiber with core and cladding indexes of refraction of 1.545 and 1.510, respectively. The cut off wavelengthis.

A

2.3um

B

1.29um

C

1.5um

D

3.24um

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 5

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A 12-bit ADC is operating with a lus clock period and total conversion time is seen to be 14us always. The ADC mustbe of the type

A

Flash type

B

Counting type

C

Integrating type

D

Successive approximation type

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 6

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Consider the analog signal $$x(t) = 3 \cos 100 \pi t$$. If the signal is sampled at 200 Hz,the discrete time signal obtained will be

A

$$3 \cos(\frac{\pi n }{4})$$

B

$$3 \cos(\frac{\pi n }{2})$$

C

$$3 \cos(\pi n)$$

D

$$3 \cos(\frac{\pi n }{3})$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 7

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In VHDLall the statements written inside a process statement are ......

A

Concurrent

B

Sequential

C

Both (a) and (b)

D

None of the above

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ISRO Scientist or Engineer Electronics 2011 - Question 8

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A microprocessor with 12-bit address bus will be able to access ...... kilobytes of memory

A

0.4

B

2

C

10

D

4

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 9

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A practical current source is usually represented by

A

A resistance in series with an ideal current source.

B

A resistance in parallel with an ideal current source.

C

A resistance in parallel with an ideal voltage source.

D

None of the above.

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 10

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The dominant mode in a rectangular wave guide is TEo, because this mode has

A

No attenuation

B

No cut off

C

No magnetic field component

D

The highest cut-off wavelength

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ISRO Scientist or Engineer Electronics 2011 - Question 11

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A PN junction in series with a 100 ohm resistor is forward biased so that a current of 100 mA flows. If voltage across the combination is instantaneously reversed to 10 V at time t = 0, the reverse current that flows through the junction at t= 0 is approximately given by.

A

0 mA

B

200 mA

C

50 mA

D

100 mA

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 12

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Ripple factor for a half waverectifier is ......

A

1.65

B

1.45

C

1

D

1.21

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 13

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........ is a primitive that can execute code. It contains an instruction pointer (=program counter) and sometimes has its own stack

A

Process

B

Task

C

Kernel

D

Thread

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ISRO Scientist or Engineer Electronics 2011 - Question 14

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If the $$\alpha$$ and $$\beta$$ are the roots of the equation $$x^{2} + px + q = 0$$, then $$\sum \alpha^{2}$$ is

A

$$p^{2} + 2q$$

B

$$p + 2q$$

C

$$p^{2} - 2q$$

D

$$p - 2q$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 15

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A signal $$m_{1}$$ (t) is band limited to 3.6 kHz and the three other signals $$m_{2}(t), m_{3}(t)$$ and $$m_{4}(t)$$ are band limited to 1.2 kHz each, and these signals are transmitted by means of TDM. Then, what will be the transmission bandwidth of the channel.

A

7.2 KHz

B

14.4 KHz

C

3.6 KHz

D

2.4 KHz

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 16

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For a 10 bit PCM system the signal to quantization noise ratio is 62dB. If the number of bits is increased by 2, then the signal to quantization noise ratio will

A

Increase by 6 dB

B

Increase by 12 dB

C

Decrease by 6 dB

D

Decrease by 12 dB

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 17

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The modulation normally used with the digital data is

A

FM

B

AM

C

SSB

D

QPSK

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 18

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The critical angle $$\theta c$$ in an optical fiber is given by .............. Where $$n_1$$, is refractive index of medium 1 and $$n_2$$ is the refractive index of medium 2.

A

$$\sin^{-1}(\frac{n_{2}}{n_{1}})$$

B

$$\sin^{-1}(\frac{n_{1}}{n_{2}})$$

C

$$\sin^{-1}({n_{2}} * {n_{1}})$$

D

$$\sin^{-1} n_{2}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 19

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In a JK flip flop we have J = Q’ and K = 1. Assuming that the flip flop was initially cleared and clocked for 6 pulses, the sequence at the Q output will be

A

010000

B

011001

C

010010

D

010101

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 20

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Which of the following system is linear

A

$$y(n) = e^{x(n)}$$

B

$$y(n) = Ax(n) + B$$

C

$$y(n) = x(n^{2})$$

D

$$y(n) =x^{2}(n)$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 21

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Which of the following operator cannot be synthesized by VHDL synthesis tools

A

$$+$$

B

$$-$$

C

$$*$$

D

$$\&$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 22

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Which of the following statements with reference to a generic microprocessor is correct?

A

Instruction cycle time period is exactly equal to machinecycle time period

B

Instruction cycle timeperiod is shorter than machine cycle time period

C

Machine cycle time period is shorter than instruction cycle time period

D

Instruction cycle time period is exactly half of machine cycle time period

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ISRO Scientist or Engineer Electronics 2011 - Question 23

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An electric iron designed for 110V AC supply was rated at 500W. It was put across a 220V supply. Assuming that at 110V it supplied 500W output(i.e no losses) at the new voltage it will supply

A

2500W

B

250W

C

SOOW

D

2000W

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 24

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A very lossy, $$\frac{\lambda}{4}$$ long, 50 ohm transmission line is open circuited at the load end. The input impedance measured at the other end of the line is approximately.

A

0

B

$$ \infty $$

C

50 ohm

D

none of the above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 25

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For the 2N338 transistor, the manufacturer specifies P max =100mW at $$25^\circ C$$ free air temperature and the maximum junction temperature, Tj max = $$125^\circ  C$$. Its thermal resistance is

A

$$10^\circ \frac{C}{W}$$

B

$$100^\circ \frac{C}{W}$$

C

$$1000^\circ \frac{C}{W}$$

D

$$10,000^\circ \frac{C}{W}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 26

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In a Class AB amplifier, the current flows through the active device for

A

Less than half of the duration of input cycle

B

Half duration of input cycle

C

More than half but less than full cycle duration

D

Full duration of input cycle

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 27

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Whichof the following is not true regarding a preemptive kernel

A

If a high priority thread becomes ready to run, low priority thread is preempted

B

The kernel checks forthe highpriority ready to runthreads when ever cal

C

The executing thread is never interrupted

D

There are special demands on communication between threads and handling common resources

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 28

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The solution of differential equation $$\frac{dy}{dx} = e^{x - y} + x^{2} e^{-y}$$ is

A

$$e^{y} = e^{x} + \frac{x^{3}}{3} + c$$

B

$$e^{y} - e^{x} = c$$

C

$$x - e^{y} = c$$

D

$$e^{y} + e^{x} + \frac{x^{3}}{3} + y = 0$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 29

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The intermediate frequency of a super-heterodyne receiver is 450 KHz. If it is tuned to 1200 KHz, the image frequency will be

A

750 KHz

B

900 KHz

C

1600 KHz

D

2100 KHz

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 30

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The bandwidth of a ‘N’ bit binary coded PCM signal for modulating a signal having bandwidth of 'f' Hz is

A

$$\frac{f}{N}$$ HZ

B

f

C

Nf

D

N

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 31

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Go-stationary satellites are placed in equatorial orbits at the height approximately

A

1000 km

B

15000 km

C

25000 km

D

36000 km

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 32

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For a single mode optical cable with 0.25dB/km loss, the optical power 100km from a 0.l1mW source will be .....

A

-30dBm

B

-35dBm

C

-40dBm

D

-45dBm

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 33

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The function of a strobe function in digital system is

A

To reset memory register.

B

To check the functioning of a logic gate

C

To avoid race problem

D

Totri-state the output of the register

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 34

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The impulse responseof a linear time invariant system is h (n) = {1,2, 1,-1}. The response for the input signal x(n) = {1,2,3,1} is

A

{1,8,4,8,3,-1,-2}

B

(1,4, 8,3, 8, -2, -2}

C

{1,4,8,8,3,-2,.-1}

D

{1,8,3,8,8,4,-1}

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 35

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Which of the following statement regarding a constantis not true

A

Constant defined in a package can be referenced by any entity or architecture for which packageis used.

B

The value of constant can be changed with in the design description

C

Constant defined in an architecture is visible only to that architecture

D

Constant defined in a process declarative regionis not visible outside that process

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 36

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In a 3085 microprocessor system with memory mapped $$\frac{I}{O}$$

A

$$\frac{I}{O}$$ devices have 8 bit address

B

$$\frac{I}{O}$$devices are accessed using IN and OUTinstructions.

C

There can be maximum 256 input and 256 output devices

D

Arithmetic and logic operations can be directly performed with I/O dat

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 37

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The Thevenin and Norton circuits are

A

Single frequency equivalent circuits

B

Multi frequency equivalent circuits

C

Equivalent independent of frequency

D

Band frequency equivalent circuits

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 38

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A broadside array operating at 100 cm wavelength consist of 4 half wave dipoles spaced 50 cm apart. Each element carries radio frequency current in the same phase and of magnitude 0.5 A. The radiated power will be .................. if the radiation resistance is 146 ohm.

A

146W

B

73 watts

C

36.5 W

D

18.25 W

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 39

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An NPN transistor has a beta cutoff frequency $$f_{\beta}$$, of 1MHz, and a common emitter short circuit low frequency current gain $$\beta_{o}$$, of 200. its unity gain frequency $$f_{\gamma}$$ and the alpha cut-off frequency f, respectively are

A

200 MHz,201 MHZ

B

200 MHz, 199 MHz

C

199 MHz, 200 MHz

D

201 MHz, 200 MHz

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 40

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Fora class B amplifier providing a 20V peak signal to 16 ohm load and a power supply of $$V_{cc}$$= 30V,the efficiency will be.

A

52.3%

B

25.65%

C

75%

D

78.6%

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 41

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When a microprocessorinterfaces with a peripheral or memory device, the normaltiming of the microprocessor may need to be altered by introducin

A

Latching

B

Wait states

C

Tristate logics

D

None of the above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 42

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$$\int_{0}^{\frac{\pi}{2}} (\cos^{3} x)dx =$$

A

$$\frac{3}{2}$$

B

$$\frac{2}{3}$$

C

$$\frac{8}{9}$$

D

$$\frac{8}{13}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 43

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In phase modulatedsignal, the frequency deviation is proportional to

A

Frequency only

B

Amplitude only

C

Both (a) and (b)

D

none of the above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 44

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For a fast communication which of the following requirements have to be met

A

Large bandwidth

B

High $$\frac{S}{N}$$

C

High channel capacity

D

Noneofthe above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 45

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For an earthstation transmitter input power of 40dBW (10,000W), with a back
off loss of 3dB, a total branching and feeder loss of 3dB, and a transmit antenna
gain of 40 dB, determine the EIRP.

A

40dBW

B

74dBW

C

34dBW

D

80dBW

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 46

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................ is used to describe the light gathering or light collecting ability of an optical fiber

A

Critical angle

B

Cut-off wavelength

C

Numerical Aperture

D

Acceptance angle

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 47

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............ has the maximum fan out capacity

A

MOS

B

CMOS

C

ECL

D

RTL

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 48

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If $$Z$$ transform of $$x(n)$$ is $$X(z)$$ then the $$Z$$ transform of $$x(n - k)$$ is .............

A

$$X(z^{-k} z)$$

B

$$X(z^{k} z)$$

C

$$z^{-k} X(z)$$

D

$$z^{k} X(z)$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 49

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The following code will implement a ................
process (clk, d) begin
        if (clk = ‘1’) then
           $$q \leq 4d$$;
end if;
end process

A

Positive edge triggered D flip flop

B

Negative edge triggered D flip flop

C

A latch

D

None of the above.

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 50

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The greatest negative number which can be stored in a 8-bit register using 2’s complement arithmetic is

A

-256

B

-255

C

-127

D

-128

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 51

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Two coupled coils have self inductances $$L1 = 10mH$$ and $$L2 = 20mH$$. The co-efficient of coupling (K) being 0.75 in the air. Voltage in the second coil when the current in circuit is given by $$I = 2 \sin (314 t) A$$ is..........

A

$$3.14 \cos(314 t) V$$

B

$$3.33 \sin(314 t) V$$

C

$$6.66 \cos(314 t) V$$

D

$$6.28 \cos(314 t) V$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 52

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In aradarsystem,if the peak transmitted poweris increased by a factor of 16 and the antenna diameteris increased by a factor of 2, then the maximum range will increase by a factor of

A

16

B

8

C

4

D

$$\sqrt{8}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 53

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The transconductance g_ of an FET in the saturation region equals

A

$$\frac{-2I_{Dss}}{V_{p}} \left[1 - \frac{V_{GS}}{V_{P}}\right]$$

B

$$\frac{-2I_{Dss}}{V_{p}} \left[1 - \frac{V_{GS}}{V_{P}}\right]^{2}$$

C

$$\frac{-2I_{Dss}}{V_{p}} \left[1 - \frac{V_{GS}}{V_{P}}\right]^{\frac{1}{2}}$$

D

$$\frac{I}{V_{p}} \left[I_{DSS} \times I_{DS}\right]^{\frac{1}{2}}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 54

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The transistor amplifier with 85% of efficiency is likely to be

A

ClassA

B

Class B

C

Class AB

D

Class C

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 55

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A run-time stack cannot be used in a round-robin scheduling system because of the _.................. nature of scheduling.

A

LIFO (Last in First out)

B

FIFO ( First in First out)

C

FILO (Furst in Last out)

D

None of the above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 56

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$$(3 + i)/(5 + 5i)$$ is same as

A

$$\frac{(2-i)}{5}$$

B

$$3 - i$$

C

$$5 - 5i$$

D

$$\frac{(2 + i)}{5}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 57

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The modulation index of an amplitude modulated waveis changed from 0 to 1. the transmitted power is

A

Doubled

B

Halved

C

Increased by 50percent.

D

Unchanged.

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 58

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In a communication system, each message(1 or 0) is transmitted three times in order to reduce the probability of error. The detection is based on the majority rule at the receiver. If Pc is the probability of bit error, the probability of error for this communication channel will be

A

$$ 3Pc^{2}-2Pc^{3}$$

B

$$1-Pc^{2}-Pc^{3}$$

C

$$Pc^{3}$$

D

$$ Pc^{2}(1-Pc)$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 59

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Fora satellite transponder with a receiver antenna gain of 12 dB , an LNA gain of 10 dB, and equivalent noise temperature of $$26  dBK^{-1}$$, the $$\frac{G}{Te}$$ is

A

$$4  dBK^{-1}$$

B

$$-4  dBK^{-1} $$

C

$$26  dBK^{-1} $$

D

$$-26  dBK^{-1} $$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 60

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............currentis the leakage current that flows through a photo diode with no input used in as light detectors.

A

Leakage

B

Dark

C

saturation current

D

Detection

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 61

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The figure of merit of a logic family is given by

A

Gain bandwidth product

B

(propagation delay time) * (power dissipation)

C

fanout * ( propagation delay time)

D

(noise margin) * (power dissipation)

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 62

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............... is defined as the time delay that a signal component of frequency $$\omega$$ undergoesas it passes from the input to output of the system.

A

Phase delay

B

Group delay

C

Frequency deviation

D

Latency

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 63

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Which statementis true regarding a behavior modeling in VADL

A

There can be more than one process statementin an architecture which will interact concurrently

B

Behavioral style of architecture can have only concurrent assignment statements

C

Processis not a single concurrent statement

D

A process need not havesensitivity list for proper implementation

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 64

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The process of imitating one system with anotherso that the imitating systems accepts the samedata, executes same programs and achieves sameresults as the imitated systems is known as

A

Simulation

B

Modification

C

Translation

D

Emulation

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ISRO Scientist or Engineer Electronics 2011 - Question 65

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The values of R, L and C in series RLC circuit that resonates at 1.5 KHz and consumes 50W from a 50V ac source operating at the resonant frequency. The bandwidth is 0.75 KHz.

A

R = 50 ohm, L = 10.6 mH, C = 1.06 uF.

B

R = 500 ohm, L = 10.6 mH, C = 10.6 uF.

C

R = 50 ohm, L = 1.06 mH, C = 10.6 uF.

D

R = 500 ohm, L = 1.06 mH, C = 1.06 uF.

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 66

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When VSWR is 3, the magnitude of the reflection co-efficient will be

A

$$\frac{1}{4}$$

B

$$\frac{1}{3}$$

C

$$\frac{1}{2}$$

D

1

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ISRO Scientist or Engineer Electronics 2011 - Question 67

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The conductivity of the intrinsic germanium at $$300^\circ$$K is . When, $$n_{i}$$; at $$300^\circ K = 2.5 X 10^{13}/cm$$ and $$\mu_{n}$$, and $$\mu_{p}$$, in germanium are 3800 and 1800 cm$$^2$$/Vs respectively.

A

0.224 S/cm

B

0.0224 S/cm

C

2.24 S/cm

D

0.00224 S/cm

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 68

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As comparedto a full waverectifier using 2 diodes, the four diode bridge rectifier has the dominant advantage of

A

Higher current carrying

B

Lowerpeak inverse requirement

C

Lowerripple factor.

D

Higherefficiency.

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 69

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In a real time system, the simplest scheme that allows the operating system to allocate memory to two processes simultaneously is ............

A

Over lays

B

Pipeline

C

Swapping

D

None of the above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 70

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$$(\cos 5 \theta - i \sin 5 \theta)^{2}$$ is same as

A

$$\cos 10 \theta + 1 \sin 10 \theta$$

B

$$\cos 25 \theta - i \sin 25 \theta$$

C

$$(\cos \theta + 1 \sin \theta)^{-10}$$

D

$$(\cos \theta - i \sin \theta )^{-10}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 71

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In case of which of the following, an increase on the modulation index leads to increase in bandwidth

A

PM

B

FM

C

AM

D

Both (a) and (b)

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ISRO Scientist or Engineer Electronics 2011 - Question 72

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Four voice signals, each limited to 4 kHz and sampled at Nyquist rate, are converted into binary PCM signal using 256 quantisation levels. The bit transmission rate for the time division multiplexing signal will be

A

8 kbps

B

64 kbps

C

256 kbps.

D

5126 kbps

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 73

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If a counter having 10 FFsis initially at 0, what count will it hold after 2060 pulses?

A

000 000 1100

B

000 001 1100

C

000 001 1000

D

000 000 1110

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ISRO Scientist or Engineer Electronics 2011 - Question 74

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The output of a circular convolution performed on two signals $$x_{1}(n) = {\underline{2}, 1, 2, 1}$$ and $$x_{2}(n) = {\underline{1}, 2, 3, 4}$$ is

A

$${\underline{16}, 14, 16, 14}$$

B

$${\underline{14}, 16, 14, 16}$$

C

$${\underline{12},14, 12, 14}$$

D

$${\underline{14}, 12, 14, 12}$$

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 75

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Whenusing a sequential code to design a combinational logic in VHDL,if complete truth table is not defined, the synthesis tool will implement a which is not required.

A

Clock buffer

B

Buffer

C

Flip Flop

D

Latch

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 76

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In whatorder the elements of a pushdownstack are accessed?

A

First-In-First Out (FIFO)...

B

Last In Last Out (LILO)

C

Last In First Out (LIFO)

D

None of the above

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 77

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What is the value of C such that equivalent capacitance across x - y is 5F

A

20 F

B

23 F

C

22 F

D

21 F

View Solution

ISRO Scientist or Engineer Electronics 2011 - Question 78

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A wave guide section in a microwave circuit will act as a

A

Low passfilter

B

Bandpassfilter

C

High pass filter

D

Bandstop filter

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ISRO Scientist or Engineer Electronics 2011 - Question 79

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24V, 600mW Zeneris to be used for providing a 24V stabilized supply to a variable load. Assume that for proper Zener action, a minimum of 10 mA must flow through the Zener. If the input voltage is 32V, what would be the value of R and the maximum load current?

A

320 ohm, 10mA

B

400 ohm, 15mA

C

400 ohm, 10mA

D

320 ohm, 15mA

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ISRO Scientist or Engineer Electronics 2011 - Question 80

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The value of x at which y has a minimum for $$y = x^{2} - 3x + 1$$ is

A

$$\frac{-3}{2}$$

B

$$\frac{3}{2}$$

C

0

D

None of these

View Solution