Electrical Engineering Mcqs Practice Test

Question 1

The dissipation factor of a good dielectric is of the order of____________?

Accepted Answer

A. 0.0002

Question 2

Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them_____________?

Accepted Answer

C. two in parallel and third in series with this combination

Question 3

The sparking between two electrical contacts can be reduced by inserting a___________?

Accepted Answer

A. capacitor in parallel with contacts

Question 4

Which of the following statements is incorrect _________________?

Accepted Answer

B. The stored energy in a capacitor decreases with reduction in value of capacitance

Question 5

In the case of a lossy capacitor, its series equivalent resistance value will be_______________?

Accepted Answer

C. large

Question 6

Which of the following capacitors has relatively shorter shelf life____________?

Accepted Answer

B. Electrolytic capacitor

Question 7

Which of the following expression is correct for electric field strength___________?

Accepted Answer

A. E = D/E

Question 8

Which of the following statement is true __________?

Accepted Answer

B. The current in the dicharging capacitor grows exponentially

Question 9

Which of the following materials has the highest value of dielectric constant___________?

Accepted Answer

D. Oil

Question 10

For which of the following parameter variation, the capacitance of the capacitor remains unaffected ____________?

Accepted Answer

D. Thickness of the plates

Question 11

Which of the following capacitors will have the least variation ____________?

Accepted Answer

C. Silver plated mica capacitor

Question 12

In a capacitor the electric charge is stored in____________?

Accepted Answer

B. dielectric

Question 13

“The total electric flux through any closed surface surrounding charges is equal to the amount oflcharge enclosed”. The above statement is associated with____________?

Accepted Answer

B. Gauss’s law

Question 14

Two plates of a parallel plate capacitor after being charged from a constant voltage source are separated apart by means of insulated handles, then the____________?

Accepted Answer

B. voltage across the plates decreases

Question 15

Voltage applied across a ceramic dielectric produces an electrolytic field 100 times greater than air. What will be the value of dielectric constant ________?

Accepted Answer

B. 100

Question 16

Which of the following statements is correct ___________?

Accepted Answer

B. Electrolytic capacitor must be connected in the correct polarity

Question 17

If A.C. voltage is applied to capacitive circuit, the alternating current can flow in the circuit because__________________?

Accepted Answer

A. varying voltage produces the charging and dicharging currents

Question 18

A dielectric material must be____________?

Accepted Answer

B. insulator

Question 19

The capacitance of a capacitor is not affected by____________?

Accepted Answer

C. thickness of plates

Question 20

The units of capacitance are____________?

Accepted Answer

B. coulombs/volt