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All Electrical Engineering MCQs

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

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2671Electrical EngineeringMedium

Single phase VSI are mainly used in________?

AMultilevel configuration

BPower supplies

CAll of these

DUps

Correct answer

C. All of these

Explanation

The correct answer is All of these.

2672Electrical EngineeringMedium

Ohm’s law is not applicable to________?

Asemi-conductors

Bsmall resistors

Chigh currents

DD. C. circuits

Correct answer

A. semi-conductors

Explanation

The correct answer is semi-conductors.

2673Electrical EngineeringMedium

An IC has ________size?

ANone of the above

BExtremely small

CVery large

DLarge

Correct answer

B. Extremely small

Explanation

The correct answer is Extremely small.

2674Electrical EngineeringMedium

Choose the incorrect statement: A branch formed by the parallel connection………

AA branch formed by the series connection of any resistor R and a short circuit has the characteristic of resistor R.

BA branch formed by the series connection of any resistor R and an open circuit has the characteristic of an open circuit.

CA branch formed by the parallel connection of any resistor R and a short circuit has the characteristic of a short circuit.

DA branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit.

Correct answer

D. A branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit.

Explanation

The correct answer is A branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit..

2675Electrical EngineeringMedium

The PIV rating of a crystal diode is ________ that of equivalent vacuum diode

Alower than

Bnone of the above

Cthe same as

Dmore than

Correct answer

A. lower than

Explanation

The correct answer is lower than.

2676Electrical EngineeringMedium

During rheostat braking of D.C. series motors________?

Amotor is run as a generator

Bmotor is run at reduced speed

Cmotor is reversed in direction

Correct answer

A. motor is run as a generator

Explanation

The correct answer is motor is run as a generator.

2677Electrical EngineeringMedium

In a differentially compounded D.C. motor, if shunt field suddenly opens________?

Athe motor will first stop and then run in opposite direction as series motor

Bthe motor will work as series motor and run at high speed in the same direction

Cthe motor will not work and come to stop

Dthe motor will work as series motor and run at slow speed in the same direction

Correct answer

A. the motor will first stop and then run in opposite direction as series motor

Explanation

The correct answer is the motor will first stop and then run in opposite direction as series motor.

2678Electrical EngineeringMedium

For a D.C. generator when the number of poles and the number of armature conductors is fixed, then which winding will give the higher e.m.f________?

AWave winding

BLap winding

CEither of A. and B. above

DDepends on other features of design

Correct answer

A. Wave winding

Explanation

The correct answer is Wave winding.

2679Electrical EngineeringMedium

The dielectric constant (relative permittivity) of glass is given by________?

A5 to 100

B0.1 to 0.4

C2.0 to 4.0

D0.5 to 1.0

Correct answer

A. 5 to 100

Explanation

The correct answer is 5 to 100.

2680Electrical EngineeringMedium

Which of the following is not a unit of inductance?

AVolt second per ampere

BAll of the above

CHenry

DCoulomb/volt ampere

Correct answer

D. Coulomb/volt ampere

Explanation

The correct answer is Coulomb/volt ampere.

Choose the incorrect statement: A branch formed by the parallel connection………

AA branch formed by the series connection of any resistor R and a short circuit has the characteristic of resistor R.

BA branch formed by the series connection of any resistor R and an open circuit has the characteristic of an open circuit.

CA branch formed by the parallel connection of any resistor R and a short circuit has the characteristic of a short circuit.

DA branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit.

Correct answer

D. A branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit.

Explanation

The correct answer is A branch formed by the parallel connection of any resistor R and open circuit has the characteristic of an open circuit..

In a differentially compounded D.C. motor, if shunt field suddenly opens________?

Athe motor will first stop and then run in opposite direction as series motor

Bthe motor will work as series motor and run at high speed in the same direction

Cthe motor will not work and come to stop

Dthe motor will work as series motor and run at slow speed in the same direction

Correct answer

A. the motor will first stop and then run in opposite direction as series motor

Explanation

The correct answer is the motor will first stop and then run in opposite direction as series motor.