Question # 1

When current passes through a solenoid coil, it behaves like a

Choose an answer

loop

circle

bar magnet

none of these

In a moving coil galvanometer, the deflecting couple depends upon

Choose an answer

area of the coil

number of turns of coil

value of magnetic field

all of the above

A long wire wound tightly on a cylindrical core is called:

Choose an answer

Potentiometer

Solenoid

Toroid

Wheat and stone bridge

None of these

The magnetic field outside the solenoid due to current is

Choose an answer

strong

zero

weak

uniform

Avo-meter is used of measure the

Choose an answer

current, voltage

voltage, resistance

resistance, current

current, voltage and resistance

A magnetic force on an electron travelling with 10⁸ms^-1parallel to a field of strength 1 Wb m^-2is

Choose an answer

Zero

10⁵m

10^-10N

10⁸N

Charge to mass ratio (e/m) of an electron is given by the relation

Choose an answer

e/m = 2V/Br²

e/m = 2V/B²r

e/m = 2V/B²r²

e/m = V/2B²r²

The e/m of an electron moving in a circular path in a magnetic field is equal to

Choose an answer

V/Br

V/B²r²

V²/Br²

V²/Br

The current sensitivity of the galvanometer is

Choose an answer

C/BAN

BAN/C

CAN/B

CBN/A

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Choose an answer

magnetic flux

magnetic induction

magnetic field

self inductance

In the region surrounding a current carrying wire:

Choose an answer

A magnetic field is setup

The lines of force are elliptical

Direction of lines of forces depends upon direction of current

Both (A) and (C)

All of these

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Choose an answer

Point the direction of N-S

Set themselves tangential to the circle

Point in the direction of E-W

None of these

Point in direction of S-E

The field around a moving charge is called

Choose an answer

magnetic field

conservative field

non-conservative field

none of these

Which one of the following relations is correct?

Choose an answer

1 Wb-m²= Nm^-1A^-1

1 tesla = 104 gausses

1 Wb-m²= 1 tesla

All of the above

The gavanometer constant of a moving coil galvanometer is given by

Choose an answer

K=BAN/C

K=BN/CA

K=NAC/B

K=C/BAN

More Classes

Other Links

ECAT Physics Chapter 14 Electromagnetism Online Test MCQs With Answers

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer

Choose an answer