Electrical Engineering Mcqs Practice Test

Question 1

In deriving ac equivalent circuit for an amplifier circuit, we short circuit___________?

Accepted Answer

D. all capacitors

Question 2

When a transistor is connected in common emitter mode, it with have__________?

Accepted Answer

C. medium input resistance and high output resistance

Question 3

In a transistor leakage current mainly depends on__________?

Accepted Answer

D. temperature

Question 4

Voltage Series feedback also called series-shunt feedback) results in__________?

Accepted Answer

C. Increase in input impedance & decreases in output impedance

Question 5

To prevent a DC return between source and load, it is necessary to use___________?

Accepted Answer

C. capacitor between source and load

Question 6

The current gain of a BJT is__________?

Accepted Answer

C. gm rπ

Question 7

An ideal OP-AMP is an ideal___________?

Accepted Answer

B. Current controlled voltage source

Question 8

An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.2 is___________?

Accepted Answer

A. 1/11KΩ

Question 9

In the differential voltage gain & the common mode voltage gain of a differential amplifier are 48db &2db respectively, then its common mode rejection ratio is__________?

Accepted Answer

C. 46dB

Question 10

The parameter hie stands for input impedance in _____________?

Accepted Answer

C.	CE arrangement with output shorted

Question 11

The values of h parameter of a transistor in CE arrangement are ____________ arrangement?

Accepted Answer

C.	Different from that in CB

Question 12

The hfe parameter is called ______________in CE arrangement with output shorted?

Accepted Answer

B.	Current gain

Question 13

If temperature changes, h parameters of a transistor ________________?

Accepted Answer

D.	Also change

Question 14

If the operating point changes, the h parameters of transistor_____________?

Accepted Answer

A.	Also change

Question 15

The dimensions of hie parameter are _______________?

Accepted Answer

B.	Ohm

Question 16

There are ______________ h parameters of a transistor?

Accepted Answer

B.	Four

Question 17

A transistor behaves as a linear device for _____________?

Accepted Answer

A.	Small signals only

Question 18

The h parameter approach gives correct results for_______________?

Accepted Answer

B.	Small signals only

Question 19

Hybrid means_____________?

Accepted Answer

A.	Mixed

Question 20

In order to determine hfe and hie parameters of a transistor, __________ is an a.c. short-circuited?

Accepted Answer

C.	Output