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All Electrical Engineering MCQs

Study 3,658 Electrical Engineering MCQs with correct answers and explanations.

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2101Electrical EngineeringMedium

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

Acharging current can flow

Bdischarge current can flow

Cvarying voltage produces the charging and discharging currents

Dof high peak value

Correct answer

C. varying voltage produces the charging and discharging currents

Explanation

The correct answer is varying voltage produces the charging and discharging currents.

2102Electrical EngineeringMedium

Which of the following is an advantage of heating by electricity?

AAbsence of flue gases

BHigher efficiency

CAll of the above

DQuicker operation

Correct answer

C. All of the above

Explanation

The correct answer is All of the above.

2103Electrical EngineeringMedium

A constant current signal across a parallel RLC circuits gives an o/p of 1.4v at the signal frequency of 3.89KHZ and 4.1KHZ.At the frequency of 4KHZ,the o/p voltage will be________?

A1 v

B1.4v

C2v

D2.8v

Correct answer

C. 2v

Explanation

The correct answer is 2v.

2104Electrical EngineeringMedium

Cables, generally used beyond 66 kV are________?

Aarmoured

BS.L. type

Cbelted

Doil filled

Correct answer

D. oil filled

Explanation

The correct answer is oil filled.

2105Electrical EngineeringMedium

A region around a stationary electric charge has________?

Aa magnetic field

Ban electric field

Cboth A. and (6)

Dnone of the above

Correct answer

B. an electric field

Explanation

The correct answer is an electric field.

2106Electrical EngineeringMedium

While applying Fleming’s right-hand rule to And the direction of induced e.m.f., the thumb points towards________?

Adirection of flux

Bdirection of motion of the conductor if forefinger points in the direction of generated e.m.f.

Cdirection of induced e.m.f.

Ddirection of motion of conductor, if forefinger points along the lines of flux

Correct answer

D. direction of motion of conductor, if forefinger points along the lines of flux

Explanation

The correct answer is direction of motion of conductor, if forefinger points along the lines of flux.

2107Electrical EngineeringMedium

The permissible flux density in case of cold rolled grain oriented steel is around________?

A4.7 Wb/m2

B1.7 Wb/m2

C3.7 Wb/m2

D2.7 Wb/m2

Correct answer

B. 1.7 Wb/m2

Explanation

The correct answer is 1.7 Wb/m2.

2108Electrical EngineeringMedium

The ear is not sensitive to________?

AFrequency as well as amplitude distortion

BAmplitude distortion

CFrequency distortion

Correct answer

C. Frequency distortion

Explanation

The correct answer is Frequency distortion.

2109Electrical EngineeringMedium

In D.C. machines the width of the duct is usually________?

A4 mm

B6 mm

C10 mm

D8 mm

Correct answer

C. 10 mm

Explanation

The correct answer is 10 mm.

2110Electrical EngineeringMedium

If the temperature increases, the value of VCE________?

AIs decreased

BIs increased

CRemains the same

DNone of the above

Correct answer

A. Is decreased

Explanation

The correct answer is Is decreased.

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

Acharging current can flow

Bdischarge current can flow

Cvarying voltage produces the charging and discharging currents

Dof high peak value

Correct answer

C. varying voltage produces the charging and discharging currents

Explanation

The correct answer is varying voltage produces the charging and discharging currents.

While applying Fleming’s right-hand rule to And the direction of induced e.m.f., the thumb points towards________?

Adirection of flux

Bdirection of motion of the conductor if forefinger points in the direction of generated e.m.f.

Cdirection of induced e.m.f.

Ddirection of motion of conductor, if forefinger points along the lines of flux

Correct answer

D. direction of motion of conductor, if forefinger points along the lines of flux

Explanation

The correct answer is direction of motion of conductor, if forefinger points along the lines of flux.