Basic Concept of Electricity MCQs

Question 1

AD = IC is based on

Accepted Answer

Gauss's law

Answer

Ampere's law

Answer

Faraday's law

Answer

Coulomb's law.

Question 2

"The total electric flux through any closed surface surrounding charges is equal to the amount of charges enclosed".The above statement is based on

Accepted Answer

Gauss's law

Answer

Maxwell's law

Answer

Ampere's law

Answer

Coulomb's law

Question 3

Which of the following is a scalar quantity?

Accepted Answer

Electric potential

Answer

Electric field strength

Answer

Electric displacement density

Answer

Force

Question 4

The electric potential due to an electric dipole of length 'I' at a point distance 'r' away from it will be doubled if the

Accepted Answer

length 1 of the dipole is doubled.

Answer

r is doubled

Answer

r is halved

Answer

1 is halved.

Question 5

Dielectric strength of a medium

Accepted Answer

decreases with the increase in thickness

Answer

increases with the increase in temperature.

Answer

increases with moisture content

Answer

is not affected by the moisture content.

Question 6

The time constant of an RC series circuit connected to a dc source is equal to

Accepted Answer

CR

Answer

?R

Answer

?C

Question 7

The magnetic susceptibility of a paramag-netic material is

Accepted Answer

less than one but positive

Answer

less than zero.

Answer

greater than one

Answer

equal to zero.

Question 8

A keeper is used for

Accepted Answer

providing a closed path for the magnetic flux.

Answer

restoring of lost flux.

Answer

amplification of flux.

Answer

changing the direction of magnetic lines of force.

Question 9

Force experienced by a unit north pole at any point is known as

Accepted Answer

magnetic flux strength

Answer

mmf.

Answer

magnetic flux density.

Answer

magnetic potential