Electrical Engineering Mcqs

The self-inductance of a solenoid is increased when a soft iron core is inserted into it. This is because the soft iron core_______________?

(A) Decreases the resistance of the solenoid

(B) Reduces the effect of eddy current

(C) Improves the flux linkage between the turns of the coil

(D) Increases the mutual inductance between the solenoid and the core

Submitted By: Ali Uppal


Submitted By: Ali Uppal


Non inductive resistances are used in decreasing______________?

(A) Mutual inductance

(B) Self inductance

(C) Magnetic fields

(D) Heating effect

Submitted By: Ali Uppal


Which one of the following devices does not function like an electric motor ?

(A) Galvanometer

(B) Ammeter

(C) Voltmeter

(D) Transformer

Submitted By: Ali Uppal


For long distance transmission the transformer used is_____________?

(A) Step down

(B) Input voltage and output voltage remain same

(C) Step up

(D) Amplifier is used

Submitted By: Ali Uppal


Submitted By: Ali Uppal


When the motor is at its maximum speed then back emf will be______________?

(A) Maximum

(B) Zero

(C) Intermediate values

(D) No back emf

Submitted By: Ali Uppal


Transformer works on the principle of________________?

(A) Lenzs law

(B) Faradays law

(C) Mutual induction

(D) Law of conservation of power

Submitted By: Ali Uppal


Submitted By: Ali Uppal


The minimum charge on any object cannot be less than_______________?

(A) 1.6 x 10-19C

(B) 3.2 x 10-19C

(C) 9.1 x 109C

(D) no definite value exist

Submitted By: Ali Uppal