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ESE EC 2018 Achiever Study Plan: Week 1 Champion Quiz

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Question 1

An FM Signal is represented by The carrier frequency fc and frequency deviation δ, respectively, are

Question 2

What will be the maximum wavelength of photons that can be detected by photo diode having band gap 4 eV?

Question 3

A pulse radar is designed to detect objects up to 100 km and the time base is 10 μs/km. What is its maximum pulse repetition frequency?

Question 4

In the amplifier circuit, find the expression for voltage gain with feedback Avf?

Question 5

Why injection laser diode (ILD) is superior to Light Emitting Diode (LED)_____.

Question 6

Assertion (A): FSK signaling is inferior to PSK signaling.
Reason (R): PSK requires less band-width than FSK.

Question 7

What will be hole diffusion current density in n-type silicon semiconductor, when hole density decreases from 1014cm-3 to 1013 cm-3 at x = 0 and x = 1 mm?

Question 8

For the A 3000 Hz bandwidth channel has a capacity of 30 kpbs. The signal-to–noise ratio of the channel is

Question 9

For which of the following systems, the signal to noise ratio is the highest?

Question 10

In a multimeter, lead are joined across diode where red lead (positive) joins at the end of diode while black lead (Negative) is joined on other end. While joining the leads, the reading of –0.6 volts is obtained as:
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Dec 13ESE & GATE EC