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All Electrical Engineering MCQs

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

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2931Electrical EngineeringMedium

Thevenin resistance Rth is found

Abetween any two ‘open’ terminals

Bbetween same open terminals as for Etk

Cby short-circuiting the given two terminals

Dby removing voltage sources along with their internal resistances

Correct answer

B. between same open terminals as for Etk

Explanation

The correct answer is between same open terminals as for Etk.

2932Electrical EngineeringMedium

Which of the following test can be performed on DC series motor?

ABrake test

BHopkinson test

CField test

DSwinburne test

Correct answer

C. Field test

Explanation

The correct answer is Field test.

2933Electrical EngineeringMedium

A conductor of length L has current I passing through it, when it is placed parallel to a magnetic field. The force experienced by the conductor will be________?

AB2LI

BBLI

Czero

DBLI2

Correct answer

C. zero

Explanation

The correct answer is zero.

2934Electrical EngineeringMedium

The number of independent equations to solve a network is equal to________?

Athe number of branches

Bthe number of chords

Csum of the number of branches and chords

Dsum of number of branches, chords and nodes

Correct answer

B. the number of chords

Explanation

The correct answer is the number of chords.

2935Electrical EngineeringMedium

IC = [a / (1 – a )] IB +________?

AIC

BICBO

C(1 – a ) IB

DICEO

Correct answer

D. ICEO

Explanation

The correct answer is ICEO.

2936Electrical EngineeringMedium

When current feedback (negative) is applied to an amplifier, its input impedance ________?

ARemains the same

BIs increased

CIs decreased

DNone of the above

Correct answer

C. Is decreased

Explanation

The correct answer is Is decreased.

2937Electrical EngineeringMedium

A certain voltage divider consists of three 1 kΩ resistors in series. Which of the following load resistors will have the least effect on the output voltage?

A100 kΩ

B1 kΩ

C330 Ω

D1 MΩ

Correct answer

D. 1 MΩ

Explanation

The correct answer is 1 MΩ.

2938Electrical EngineeringMedium

Which of the following devices should be used for accurate measurement of low D.C. voltage?

ASmall range thermocouple voltmeter

BSmall range moving coil voltmeter

CD.C. potentiometer

DNone of the above

Correct answer

C. D.C. potentiometer

Explanation

The correct answer is D.C. potentiometer.

2939Electrical EngineeringMedium

Annual depreciation cost is calculated by________?

Anone of the above

Bstraight line method

Cboth A. and B.

Dsinking fund method

Correct answer

C. both A. and B.

Explanation

The correct answer is both A. and B..

2940Electrical EngineeringMedium

For frequencies above the resonant frequency, a series LC circuit behaves as a ________load?

AResistive

BNone of the above

CCapacitive

DInductive

Correct answer

D. Inductive

Explanation

The correct answer is Inductive.

Thevenin resistance Rth is found

Abetween any two ‘open’ terminals

Bbetween same open terminals as for Etk

Cby short-circuiting the given two terminals

Dby removing voltage sources along with their internal resistances

Correct answer

B. between same open terminals as for Etk

Explanation

The correct answer is between same open terminals as for Etk.