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Electrostatics

Study 180 Electrical Engineering MCQs with correct answers and explanations.

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161Electrical EngineeringMedium

The presence of an uncharged conductor near a charged one increases the________?

Apotential of the charged conductor

Bcharge of the charged conductor

Call of the above

Dcapacity of the charged conductor

Correct answer

D. capacity of the charged conductor

Explanation

The correct answer is capacity of the charged conductor.

162Electrical EngineeringMedium

If an electrons is allowed to move along the field in a non uniform electric field then it will follow________?

ASpiral path

BCircular path

CStraight line

DCurved path

Correct answer

C. Straight line

Explanation

The correct answer is Straight line.

163Electrical EngineeringMedium

Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will________?

Adepends upon composition of dielectric

Bdecrease

Cremain constant

Dincrease

Correct answer

B. decrease

Explanation

The correct answer is decrease.

164Electrical EngineeringMedium

Paper capacitors usually have a tolerance of________?

A± 10%

B± 20%

C± 5%

D± 15%

Correct answer

A. ± 10%

Explanation

The correct answer is ± 10%.

165Electrical EngineeringMedium

The direction of electric field due +0 positive charge is ________?

Aaway from the charge

Bboth A. and (6)

Cnone of the above

Dtowards the charge

Correct answer

A. away from the charge

Explanation

The correct answer is away from the charge.

166Electrical EngineeringMedium

Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become________?

A4 times of its original value

B1/8th of its original value

C1/4th of its original value

D8 times of its original value

Correct answer

A. 4 times of its original value

Explanation

The correct answer is 4 times of its original value.

167Electrical EngineeringMedium

A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be________?

A90 volts

Bzero

C900 volts

D9000 volts

Correct answer

D. 9000 volts

Explanation

The correct answer is 9000 volts.

168Electrical EngineeringMedium

Paper condenser is________?

Aelectrolytic condenser

Busually of fixed value

Ca variable condenser

Dalways polarised

Correct answer

B. usually of fixed value

Explanation

The correct answer is usually of fixed value.

169Electrical EngineeringMedium

Which of the following material has least value of dielectric constant?

AOil

BCeramics

CGlass

DPaper

Correct answer

A. Oil

Explanation

The correct answer is Oil.

170Electrical EngineeringMedium

The force per unit charge is know as________?

Aelectric flux

Ball of above are same

Celectric potential

Delectric intensity

Correct answer

D. electric intensity

Explanation

The correct answer is electric intensity.

161Electrical EngineeringMedium

The presence of an uncharged conductor near a charged one increases the________?

Apotential of the charged conductor

Bcharge of the charged conductor

Call of the above

Dcapacity of the charged conductor

Correct answer

D. capacity of the charged conductor

Explanation

The correct answer is capacity of the charged conductor.

162Electrical EngineeringMedium

If an electrons is allowed to move along the field in a non uniform electric field then it will follow________?

ASpiral path

BCircular path

CStraight line

DCurved path

Correct answer

C. Straight line

Explanation

The correct answer is Straight line.

163Electrical EngineeringMedium

Electric force between two point charges in air or vacuum is F. If we replace air or vacuum by an insulator (dielectric) of relative permitivity Cr the force between the charges will________?

Adepends upon composition of dielectric

Bdecrease

Cremain constant

Dincrease

Correct answer

B. decrease

Explanation

The correct answer is decrease.

164Electrical EngineeringMedium

Paper capacitors usually have a tolerance of________?

A± 10%

B± 20%

C± 5%

D± 15%

Correct answer

A. ± 10%

Explanation

The correct answer is ± 10%.

165Electrical EngineeringMedium

The direction of electric field due +0 positive charge is ________?

Aaway from the charge

Bboth A. and (6)

Cnone of the above

Dtowards the charge

Correct answer

A. away from the charge

Explanation

The correct answer is away from the charge.

166Electrical EngineeringMedium

Two charges are placed at a certain distance. If the magnitude of each charge is doubled the force will become________?

A4 times of its original value

B1/8th of its original value

C1/4th of its original value

D8 times of its original value

Correct answer

A. 4 times of its original value

Explanation

The correct answer is 4 times of its original value.

167Electrical EngineeringMedium

A hollow metallic sphere of 8cm diameter is charged with 4 x 10 8C. The potential on its surface will be________?

A90 volts

Bzero

C900 volts

D9000 volts

Correct answer

D. 9000 volts

Explanation

The correct answer is 9000 volts.

168Electrical EngineeringMedium

Paper condenser is________?

Aelectrolytic condenser

Busually of fixed value

Ca variable condenser

Dalways polarised

Correct answer

B. usually of fixed value

Explanation

The correct answer is usually of fixed value.

169Electrical EngineeringMedium

Which of the following material has least value of dielectric constant?

AOil

BCeramics

CGlass

DPaper

Correct answer

A. Oil

Explanation

The correct answer is Oil.

170Electrical EngineeringMedium

The force per unit charge is know as________?

Aelectric flux

Ball of above are same

Celectric potential

Delectric intensity

Correct answer

D. electric intensity

Explanation

The correct answer is electric intensity.