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ESE EC Exam 2018: Practice Quiz 5

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Question 1

A tuned-collector oscillator has a fixed inductance of and has to be tunable over the frequency band of 500 kHz to 1500 kHz. What is the range of variable capacitor to be used?

Question 2

A parallel-plate capacitor is made of two circular plates separated by a distance of 5 mm and with a dielectric constant of 2.2 between them. When the electric field in the dielectric is 3 × 104 V/m, the charge density of the positive plate will be, nearly

Question 3

In Avalanche Multiplication Breakdown Common Emitter, which number shows holes generated e-p pairs in C-B depletion region?

Question 4

In amplifier circuit shown, what is use of capacitor C1 connected across 1 KΩ emitter resistor as shown in figure?

Question 5

A Zener diode acts as normal PN junction diode when:

Question 6

Find the value of Norton resistance between terminal a & b in the circuit shown?

Question 7

Minimisation of logic function is done to:

Question 8

In an RTL NOR gate shown, for output Q high:

Question 9

The system matrix of a continuous time system is given by
A =
Then the characteristic equation is

Question 10

Good voice reproduction via PCM requires 128 quantization levels. If bandwidth of voice channel is 4 kHz, then data rate is
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May 5ESE & GATE EC