Question # 1

The SI unit of flux density is.

Choose an answer

Tesla

Weber

Gaun

Weber/meter

The current is measured in

Choose an answer

volts

watt

ampere

ohm

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

Choose an answer

(x)

(+)

(.)

(-)

(÷)

A current carrying conductor sets up its own:

Choose an answer

Electric field

Nuclear field

Magnetic field

Both (A) and (C)

All of these

Which is modified form of galvanometer

Choose an answer

potentiometer

battery

voltmeter

slide wire bridge

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 field around a moving charge is called

Choose an answer

magnetic field

conservative field

non-conservative field

none of these

NmA^-1is commonly called:

Choose an answer

Weber

Apmere

Guass

Coulomb

None of these

The most suitable material for permanent magnet is

Choose an answer

cobalt

iron

steel

alaminium

Electron gun consist of

Choose an answer

three anodes

heating cathode

three anodes

three anodes , heating cathode, grid

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

The torque per unit twist of coil is called

Choose an answer

proportionality constant

gravitational constant

boltzman constant

coupling constant

In order to make a voltmeter, high resistance is connected with galvanometer, in

Choose an answer

perpendicular

may be paralled or pendicular

series

none of these

Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:

Choose an answer

BACosѲ

Zero

BA

BA sinѲ

None of these

The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by

Choose an answer

F=IB/L

F= L x B/I

F = IL x B

F = IL . B

The direction of lines of force depends upon the direction of

Choose an answer

voltage

current

charges

none of these

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

Weber is a unit of

Choose an answer

magnetic flux

magnetic filed intensity

magnetic induction

magnetic flux density

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

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Choose an answer

changed

zero

unchanged

none of these

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Choose an answer

Greater than 300

Smaller than 300

Equal to 300

Any of (A) or (B)

Any of (A) or(C)

A resistance used in voltmeter is called

Choose an answer

shunt resistance

high resistance

low resistance

zero resistance

Current is measured in

Choose an answer

volts

watt

ohm

ampere

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

The magnetic field inside a solenoid can be increased by:

Choose an answer

Increasing n

Decreasing I

Increasing I

By using iron core within solenoid

All correct except (B)

The CRO is used for displaying the waveform of a given

Choose an answer

current

voltage

both of them

none of them

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Choose an answer

F =q(v/B)

F=q²(v x B)

F=q(v x B)

F= vx B

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Choose an answer

circular

elliptical

cycloid

straight line

The unit of flux density is also given by

Choose an answer

Weber/m²or Wb . m^-2

Weber/mor Wb . m

Weber/mor Wb . m^-1

Weber or Wb

The permeability of free space is measured in:

Choose an answer

Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?

Choose an answer

0

1

0.5

-1

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

Choose an answer