Question # 1

Weber is a unit of

Choose an answer

magnetic flux

magnetic filed intensity

magnetic induction

magnetic flux density

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Choose an answer

Maximum

Minimum

Zero

Very small

None of these

the current is pass through the straight wire. The magnetic field established around it has its lines of force:

Choose an answer

Circular and endless

Oval in shape and endless

Straight

Parabolic

All are true

A beam of electrons is provided by an

Choose an answer

electron gun

Suppray

Injection

None of these

The working of galvanometer depends upon torque exerted on a current carrying coil in

Choose an answer

magnetic field

electric field

gravitational field

nuclear field

A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m²The force on the wire is

Choose an answer

5N

4N

1.5N

6N

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Choose an answer

Sensitive

Accurate

Stable

None of these

The SI unit of magnetic flux is.

Choose an answer

weber

Nm^-1A^-1

tesla

gauss

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Choose an answer

Thumb

Curled fingers

Middle finger

Arm of right hand

None of these

How many number of anodes used in electron gun

Choose an answer

one

two

three

six

CRO deflects the beam of

Choose an answer

proton

a-particle

electron

neutron

A shunt resistance parallel to the galvanometer is used to convert it into

Choose an answer

avometer

millimeter

voltmeter

none of these

The CRO is used for displaying the waveform of a given

Choose an answer

current

voltage

both of them

none of them

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

A resistance used in voltmeter is called

Choose an answer

shunt resistance

high resistance

low resistance

zero resistance

A field is uniform and much stronger:

Choose an answer

Inside a long solenoid

Outside a long solenoid

At the end of a long solenoid

At the central point of long solenoid

None of these

magnetic field is a:

Choose an answer

Vector quantity

Scalar quantity

Scalar as well as scalar quantity

Any of (A) or (B)

Neither (A) nor (B)

The SI unit of magnetic flux is

Choose an answer

NmA^-2

NmA^-1

NAm^-1

Nm²A^-1

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

The current sensitivity of the galvanometer is

Choose an answer

C/BAN

BAN/C

CAN/B

CBN/A

The magnetic field outside the solenoid due to current is

Choose an answer

strong

zero

weak

uniform

The field around a moving charge is called

Choose an answer

magnetic field

conservative field

non-conservative field

none of these

F = I(L x B) is a

Choose an answer

vector

scalar

unit vector

none of these

The SI unit of magnetic permeability is

Choose an answer

WB A^-1m^-1

WB mA^-1

WB Am^-1

None of these

A voltmeter is used to measure the

Choose an answer

potential difference

current

temperature

resistance

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 force experienced by charged particle is maximum, if it moves

Choose an answer

parallel to magnetic field

perpendicular to magnetic field

opposite to the magnetic field

none of these

It is customary represent a current flowing towards the reader by a symbol

Choose an answer

(x)

(+)

(.)

(-)

(÷)

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

Choose an answer

n/AL

Al/n

nAL

nA/L

In a straight current carrying conductor, the direction of magnetic field can be found by

Choose an answer

right hand rule

left hand rule

head to tall rule

none of these

More Classes

Other Links

ECAT Pre General Science 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

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