Q. For the circuit given in the figure, the voltage VC (in volts) across the capacitor is Ans: Option C
For the circuit given in the figure, the voltage VC (in volts) across the capacitor is Read More »
Q. The distance (in meters) a wave has to propagate in a medium having a skin depth of 0.1 m so that the amplitude of the wave attenuates by 20 dB, is (A) 0.12 (B) 0.23 (C) 0.46 (D) 2.3 Ans: 0.23
Q. A 2×2 ROM array is built with the help of diodes as shown in the circuit below. Here W0 and W1 are signals that select the word lines and B0 and B1 are signals that are output of the sense amps based on the stored data corresponding to the bit lines during the read
Q. A four-variable Boolean function is realized using 4´1 multiplexers as shown in the figure The minimized expression for F(U, V ,W, X ) is Ans: (UV̅ + U̅V) W̅
Q. Red (R), Green (G) and Blue (B) Light Emitting Diodes (LEDs) were fabricated using p-n junctions of three different inorganic semiconductors having different band-gaps. The built- in voltages of red, green and blue diodes are VR, VG and VB, respectively. Assume donor and acceptor doping to be the same (NA and ND, respectively) in
Q. Consider a white Gaussian noise process 𝑁(𝑡) with two-sided power spectral density 𝑆𝑁 (𝑓) = 0.5 W/Hz as input to a filter with impulse response 0.5𝑒−𝑡2/2 (where 𝑡 is in seconds) resulting in output 𝑌(𝑡). The power in 𝑌(𝑡) in watts is (A) 0.11 (B) 0.22 (C) 0.33 (D) 0.44 Ans: 0.22
Consider a white Gaussian noise process 𝑁(𝑡) with two-sided power spectral density 𝑆𝑁 Read More »
Q. The circuit shown in the figure is used to provide regulated voltage (5 V) across the 1 kW resistor. Assume that the Zener diode has a constant reverse breakdown voltage for a current range, starting from a minimum required Zener current, IZ min = 2 mA to its maximum allowable current. The input voltage VI
Q. A lossy transmission line has resistance per unit length R = 0.05 W/ m. The line is distortionless and has characteristic impedance of 50W . The attenuation constant (in Np/m, correct to three decimal places) of the line is . Ans: 0.001 Sol:
A lossy transmission line has resistance per unit length R = 0.05 W/ m Read More »
Q. There are two photolithography systems: one with light source of wavelength λ1 = 156 nm (System 1) and another with light source of wavelength λ2 = 325 nm (System 2). Both photolithography systems are otherwise identical. If the minimum feature sizes that can be realized using System1 and System2 are Lmin1 and Lmin2 respectively,
Q. A traffic signal cycles from GREEN to YELLOW, YELLOW to RED and RED to GREEN. In each cycle, GREEN is turned on for 70 seconds, YELLOW is turned on for 5 seconds and the RED is turned on for 75 seconds. This traffic light has to be implemented using a finite state machine (FSM).
