Prepare for ISRO ICRB examinations with verified solutions covering Algorithms, Theory of Computation, Compiler Design, Computer Architecture, OS, Discrete Mathematics, and Computer Networks.
Marking scheme: +3.00 positive, -0.75 negative (ICRB Standard).
If range of a radar is to be doubled, the peak transmit power of the radar has to be :
The electric field measured in the far field of an antenna at a distance of 50m is $1\text{V/m}$. The average power densities at a distance of 500m from the antenna is
If a counter having 10 Flip Flops is initially at 0, what count will it hold after 2060 pulses ?
For a frequency modulated signal represented by $s(t) = 10\sin(6 \times 10^8 t + 2\sin 100\pi t)$. The maximum frequency deviation in the carrier from its unmodulated frequency is:
For which of the following conditions, the circuit shown below will function as precision full wave rectifier?
In a monostatic radar, if the antenna aperture is doubled, then the radar range will
The disadvantage of single stub matching is that
A certain antenna with an efficiency of 95% has maximum radiation intensity of $0.5\text{ W/sr}$. The directivity of the antenna fed by input power of 0.4 W
A memory system of size 16 K bytes is required to be designed using memory chips which have 12 address lines and 4 data lines each. Then number of such chips required to design the memory system is
In the asymptotic bode plot of a transfer function of a closed loop system shown below, the number of poles and zeros are,
Plane Wave travelling in free space has an average Poynting vector of $3\text{W/m}^2$. Average energy density ($n\text{J/m}^3$) of the wave is:
For two identical n-channel JFET's connected in parallel as shown in fig. below, the pinch-off voltage of equivalent JFET is:
The velocity at which a sinusoidal signal of $10^9\text{ rad/s}$ travels down a loss-less transmission line for which $L = 0.4\,\mu\text{H/m}$ and $C = 40\text{ pF/m}$ is
The Maxwell's equation $\nabla \times \overline{E} = -\frac{\partial\overline{B}}{\partial t}$ is obtained from:
A lossless line having characteristic impedance Zo is terminated with a load impedance of jZo. VSWR of the line will be :
A signal $1 + \cos(2\pi ft) + \cos(6\pi ft)$ where $f = 1\text{MHz}$ is sampled at 3MHz and Fourier Transform is carried out. How many lines will be seen in Fourier Transform?
The array factor of an array antenna depends on
Which of the following parameter is improved by introducing pipelining in digital design?
A transmission line having characteristic impedance 'Z' of varying length in series with a load impedance 'Z_L' appears in a Smith Chart on:
Impedance characteristics on a Smith Chart repeat after a distance of:
If τ is the time constant and ω is the applied frequency, a low pass RC filter acts as a pure integrator when:
10μF capacitor is connected across secondary winding of a high frequency transformer having primary to secondary turns ratio 5:2. What is the value of capacitance seen across primary?
What will be the output of the following circuit, if point-P is stuck at 1?
For the current mirror circuit shown below, if the emitter area of Q2 is thrice of Q1, the current I is:
Output of an Op-amp is 1V peak, and slew rate is 5V/μs. The maximum frequency of input sinusoidal signal that can be reproduced is: