ISRO Scientist or Engineer Electronics 2012
For the following questions answer them individually
ISRO Scientist or Engineer Electronics 2012 - Question 41
The S matrix of a lossless line having length $$\frac{\lambda}{4}$$ is
ISRO Scientist or Engineer Electronics 2012 - Question 42
In the following Smith Chart,
the movement from y along a constant VSWR circle to y1 needs addition of
ISRO Scientist or Engineer Electronics 2012 - Question 43
If the RF transmission is terminated in its Characteristic impedance Z,, which of the following statements is wrong :
ISRO Scientist or Engineer Electronics 2012 - Question 44
The loss-less , quarter wavelength long , RF transmission of characteristic impedance 50 Ω_ is terminatedin pureresistive load impedance 100 Ω the input impedanceis:
ISRO Scientist or Engineer Electronics 2012 - Question 45
A lossless matching circuit is shown in the figure
The values satisfying the matching condition are:
ISRO Scientist or Engineer Electronics 2012 - Question 46
The true statement for wave propagation in rectangular wave guidesfilled with air is:
ISRO Scientist or Engineer Electronics 2012 - Question 47
As the wave frequency approachesto cut-off frequency of wave guide, the correct statementis :
ISRO Scientist or Engineer Electronics 2012 - Question 48
The EM wave which does not propagate through a rectangular waveguide with a = 30 mm & b = 15 mm is
ISRO Scientist or Engineer Electronics 2012 - Question 49
The minimum inputsignal that gives outputsignal to noise ratio of 10 dB in a system that has an input impedance equal to 50 Ω, a noisefigure of 4 dB and bandwidth of 100 KHz is :
ISRO Scientist or Engineer Electronics 2012 - Question 50
In this circuit, $$V_{out}$$ is :
