ISRO Scientist or Engineer Electronics 2014
For the following questions answer them individually
In the circuit shown below, switch S1 and S2 are in open and close position respectively for long time. At $$t = t_o$$, switch S1 is closed and switch S2 is opened. What would be the current through R1 immediately after the transition of switches?
A digital board has a unipolar square clock of 250MHz. If the clock on the board at all places should have all the harmonic components which have more than 10% of DC value, the board has to be designed forat least
A switch is connected in between a 12V battery and an uncharged capacitor and a 1 KΩ resistor. At the time instant when the switch is closed, the voltage across the capacitor is:
Which type of timing violation will occur, If a digital IC is operated at clock frequency which is higher than its specified maximum clock frequency?
If the maximum effective aperture of a radiating small loop of constant current is $$\left(\frac{3}{32 \pi}\right) m^2$$, the wavelength of the radiated electromagnetic wave is:
A radar system uses magnetron as high power RF source. Its transmitter emits 300kW RF power at 10% duty factor. If the efficiency of radar transmitter during pulse is 60% and the power required during pulse off period is 1 kW..The average power dissipation in radar is,
In a fiber-optic cable, which phenomenonoccursfor signal to propagate along the inner core:
Which of the following computation will take minimum number of clock cycles, if it is implemented on 8051 micro-controller? Following is variable declaration in c code:
unsigned int a, b;
Using a quarter wave transformer of characteristic impedance 1 Ω, a load impedance of 100 Ω will be transformed to an input impedance of value:
