ESE 2022 EC Technical Quiz 12

In the system shown below, the steady state response c(t) will exhibit a resonant peak at frequency___________ rad/sec.

Assume one ideal op-amp, find V₀

If V₁ = 5 sin 20t – 0.01 sin 2000t (V)

V₂ = 5 sin 20t + 0.01 sin 2000t (V)

To implement a 6-bit flash type A to D converter the number of resistors and number of comparators required are respectively.

In a PCM system, if the code word length is increased form 6 to 8 bits, the signal to quantization noise ratio improves by the factor

Match each the items A, B and C with an appropriate item from 1, 2, 3, 4 & 5

List-I

(a). The current gain of a BJT will be increased if

(b). The current gain of a BJT will be reduced if

(c). The break – down voltage of a BJT will be reduced if

List – II

1) The collector doping concentration is increased.

2) The base width is reduced.

3) The emitter doping concentration ratio is reduced.

4) The base doping concentration is increased keeping the ratio of the emitter doping concentration to base doping concentration, constant.

5) The collector doping concentration is reduced.

What is built in potential for n⁺n^- contact

Statement I:

Sensors are almost always transducers, but transducers are not necessarily sensors.

Statement II:

Sensor are transducers that converts a physical quantity to a measurable quantity.

Consider the circuit given below

The L_eq for the circuit is _______H.

How many times will the following loop be executed?

XRA A

MVI B, 11H

INR B

LOOP: DCR B

JNZ LOOP

A potential difference of 5v is applied longitudinally across a n – type specimen of length 25mm & cross reactional area 6mm². Calculate drift velocity of majority carrier given

μ_p = 1800cm²/v–sec ,μ_n = 3800cm²/v–sec