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Electrostatics

Study 180 Electrical Engineering MCQs with correct answers and explanations.

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1Electrical EngineeringMedium

capacitors can be used only for D.C?

AAir

BMica

CElectrolytic

DPaper

Correct answer

C. Electrolytic

Explanation

The correct answer is Electrolytic.

2Electrical EngineeringMedium

at a point is equal to the negative potential gradient at that point?

AElectric intensity

BMagnetic flux density

CMagnetic flux

DElectric flux

Correct answer

A. Electric intensity

Explanation

The correct answer is Electric intensity.

3Electrical EngineeringMedium

The electric field at a point situated at a distance d from straight charged conductor is________?

Anone of the above

Binversely proportional to d

Cproportional to d

Correct answer

B. inversely proportional to d

Explanation

The correct answer is inversely proportional to d.

4Electrical EngineeringMedium

A dielectric material must be________?

Agood conductor

Bresistor

Csemi conductor

Dinsulator

Correct answer

D. insulator

Explanation

The correct answer is insulator.

5Electrical EngineeringMedium

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

ANone of the above

BSilver plated mica capacitor

CCeramic capacitor

DPaper capacitor

Correct answer

B. Silver plated mica capacitor

Explanation

The correct answer is Silver plated mica capacitor.

6Electrical EngineeringMedium

Which capacitor will be physically smaller for the same ratings ________?

ACeramic capacitor

BBoth will be of equal size

CNone of the above

DPaper capacitor

Correct answer

A. Ceramic capacitor

Explanation

The correct answer is Ceramic capacitor.

7Electrical EngineeringMedium

If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be________?

A1200 uC

B800 uC

C900 uC

D1600 uC

Correct answer

A. 1200 uC

Explanation

The correct answer is 1200 uC.

8Electrical EngineeringMedium

The number of electrons in one coulomb charge is equal to________?

A1.6 x 1019

B6.2 x 1021

C6.2 x 1018

D1.6 x 10-27

Correct answer

C. 6.2 x 1018

Explanation

The correct answer is 6.2 x 1018.

9Electrical EngineeringMedium

Which of the following statements is correct?

ACeramic capacitors must be connected in correct polarity

BMica capacitors are available in capacitance values of 5 to 20 uF

CAir capacitors have a black band to indicate the outside foil

DElectrolytic capacitors must be connected in correct polarity

Correct answer

D. Electrolytic capacitors must be connected in correct polarity

Explanation

The correct answer is Electrolytic capacitors must be connected in correct polarity.

10Electrical EngineeringMedium

Value of εr for various dielectrics is always________?

ANo hard and fast rule

BEqual to the unit

CLess than unity

DLarger than unit

Correct answer

D. Larger than unit

Explanation

The correct answer is Larger than unit.

Which of the following statements is correct?

ACeramic capacitors must be connected in correct polarity

BMica capacitors are available in capacitance values of 5 to 20 uF

CAir capacitors have a black band to indicate the outside foil

DElectrolytic capacitors must be connected in correct polarity

Correct answer

D. Electrolytic capacitors must be connected in correct polarity

Explanation

The correct answer is Electrolytic capacitors must be connected in correct polarity.