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Electrostatics

Study 180 Electrical Engineering MCQs with correct answers and explanations.

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11Electrical EngineeringMedium

A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be________?

A10 times greater than before

B5 times greater than before

C5 times smaller than before

D25 times larger than before

Correct answer

D. 25 times larger than before

Explanation

The correct answer is 25 times larger than before.

12Electrical EngineeringMedium

Which of the following capacitors will have the least value of breakdown voltage________?

APaper

BElectrolytic

CCeramic

DMica

Correct answer

B. Electrolytic

Explanation

The correct answer is Electrolytic.

13Electrical EngineeringMedium

A capacitor stores 0.24 coulombs at 10 volts. Its capacitance is________?

A0.8 F

B0.6 F

C0.024 F

D0.12 F

Correct answer

C. 0.024 F

Explanation

The correct answer is 0.024 F.

14Electrical EngineeringMedium

If the sheet of a bakelite is inserted between the plates of an air capacitor, the capacitance will________?

Abecome zero

Bdecrease

Cincrease

Dremains unchanged

Correct answer

C. increase

Explanation

The correct answer is increase.

15Electrical EngineeringMedium

Dielectric strength ________ with increasing thickness

Adecreases

Bincreases

Cnone of the above

Dremains unaltered

Correct answer

A. decreases

Explanation

The correct answer is decreases.

16Electrical EngineeringMedium

A capacitor consists of________?

Atwo conductors only

Btwo insulators only

Ctwo insulators separated by a conductor

Dtwo conductors separated by an insulator

Correct answer

D. two conductors separated by an insulator

Explanation

The correct answer is two conductors separated by an insulator.

17Electrical EngineeringMedium

The electric lines of force are________?

Adepends upon case

Bphysically existing near the charges

Cimaginary

Dphysically existing every where

Correct answer

C. imaginary

Explanation

The correct answer is imaginary.

18Electrical EngineeringMedium

select the only wrong statement?

Aan electrically neutral body is repelled both positively and negatively charged bodies

Bdissimilar charges attract each other

Crepulsion is the sure test of electrification

Dsimilar charges repel each other

Correct answer

A. an electrically neutral body is repelled both positively and negatively charged bodies

Explanation

The correct answer is an electrically neutral body is repelled both positively and negatively charged bodies.

19Electrical EngineeringMedium

The bridge used for the measurement of the value of the capacitance is________?

AWheatstone bridge

BSchering bridge

CHay’s bridge

DWien’s bridge

Correct answer

B. Schering bridge

Explanation

The correct answer is Schering bridge.

20Electrical EngineeringMedium

Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as________?

Amicro-coulomb

Bpico-coulomb

Cmilli-coulomb

Dcoulomb

Correct answer

A. micro-coulomb

Explanation

The correct answer is micro-coulomb.

select the only wrong statement?

Aan electrically neutral body is repelled both positively and negatively charged bodies

Bdissimilar charges attract each other

Crepulsion is the sure test of electrification

Dsimilar charges repel each other

Correct answer

A. an electrically neutral body is repelled both positively and negatively charged bodies

Explanation

The correct answer is an electrically neutral body is repelled both positively and negatively charged bodies.