Study mode · no timer

Electrostatics

Study 180 Electrical Engineering MCQs with correct answers and explanations.

Answers and explanations are always visible Take this test

81Electrical EngineeringMedium

at a point may be defined as equal to the lines of force passing normally through a unit cross section at that point?

AElectric intensity

BMagnetic flux density

CNone of the above

DElectric flux

Correct answer

A. Electric intensity

Explanation

The correct answer is Electric intensity.

82Electrical EngineeringMedium

The value of the capacitance depends upon the________?

Adinsity of the capacitor plates

Bgeometry of the capacitor

Cthickness of the capacitor plates

Dvoltage applied

Correct answer

B. geometry of the capacitor

Explanation

The correct answer is geometry of the capacitor.

83Electrical EngineeringMedium

A capacitor is a perfect insulator for________?

Aalternating current

Bboth for the direct and alternating current

Cdirect current

Dnone of above

Correct answer

C. direct current

Explanation

The correct answer is direct current.

84Electrical EngineeringMedium

select the correct statement?

Athe electric lines of force have no physical existence

Bthey do not cross each other and group together in dielectric

Call the above statements are true

Dthey expand laterally and contract longitudinally

Correct answer

C. all the above statements are true

Explanation

The correct answer is all the above statements are true.

85Electrical EngineeringMedium

For closer tolerances which of the following capacitors is usually preferred?

ACeramic disc capacitor

BNone of the above

CPaper capacitor

DMica capacitor

Correct answer

D. Mica capacitor

Explanation

The correct answer is Mica capacitor.

86Electrical EngineeringMedium

Which of the following statement is true ________?

AThe discharge current grows exponentially

BThe discharge current grows linearly

CThe discharge current decreases at a constant rate

DThe discharge current decays exponentially

Correct answer

D. The discharge current decays exponentially

Explanation

The correct answer is The discharge current decays exponentially.

87Electrical EngineeringMedium

capacitor is to have an energy content of 20J it must be placed across a potential difference of________?

A9 volts

B4 volts

C1 vol

D2 volts

Correct answer

D. 2 volts

Explanation

The correct answer is 2 volts.

88Electrical EngineeringMedium

If mica sheet is placed between the plates of a capacitor the capacity________?

Aincreases

Bdecreases then increases

Cincreases then decreases

Ddecreases

Correct answer

A. increases

Explanation

The correct answer is increases.

89Electrical EngineeringMedium

capacitors are used for audio frequency and radio frequency coupling and tuning?

AAir

BPlastic film

CMica

DCeramic

Correct answer

C. Mica

Explanation

The correct answer is Mica.

90Electrical EngineeringMedium

One volt is the same as________?

Aone coulomb

Bone coulomb/joule

Cone joule/coulomb

Done joule

Correct answer

C. one joule/coulomb

Explanation

The correct answer is one joule/coulomb.

select the correct statement?

Athe electric lines of force have no physical existence

Bthey do not cross each other and group together in dielectric

Call the above statements are true

Dthey expand laterally and contract longitudinally

Correct answer

C. all the above statements are true

Explanation

The correct answer is all the above statements are true.

Which of the following statement is true ________?

AThe discharge current grows exponentially

BThe discharge current grows linearly

CThe discharge current decreases at a constant rate

DThe discharge current decays exponentially

Correct answer

D. The discharge current decays exponentially

Explanation

The correct answer is The discharge current decays exponentially.