Question # 1

The strength of magnetic field around the current conductor is

Choose an answer

Smaller near the conductor

Greater near the conductor

Greater at the large distance from the conductor

Constant near and away from the conductor

Magnetic lines of force:

Choose an answer

Cannot intersect at all

Intersect at infinity

Intersect within magnet

Intersect at Neutral Point

None of these

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Choose an answer

dead beat galvanometer

stable galvanometer

shunt galvanometer

sensitive galvanomter

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 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

A full-scale deflection is obtained in a galvanometer with a current of few

Choose an answer

ampere

volts

milliampere

ohm

A charged particle moving at right angle to the magnetic field will experience

Choose an answer

minimum force

maximum force

zero

moderate force

In the expression of force experienced by electron, the direction of both v and B are

Choose an answer

parallel

zero

perpendicular

none of them

Magnetic induction is also called as:

Choose an answer

Ampere’s law

Faraday’s law

Lenz’s law

Newton’s law

Coulomb’s law

A resistance used in voltmeter is called

Choose an answer

shunt resistance

high resistance

low resistance

zero resistance

Lorentz force is defined as

Choose an answer

q(E + V x B)

q(E x B + V)

q(E x V + B)

q(E x B)

Weber is a unit of

Choose an answer

magnetic flux

magnetic filed intensity

magnetic induction

magnetic flux density

The angle of deflection of coil can be measured by the

Choose an answer

one method

three method

two method

none of these

The torque per unit twist of coil is called

Choose an answer

proportionality constant

gravitational constant

boltzman constant

coupling constant

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Choose an answer

+e(v x B)

-C(V x B)

+e²(v x B)

-e(v²x B)

The SI unit of flux density is.

Choose an answer

Tesla

Weber

Gaun

Weber/meter

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

Choose an answer

ammeter

voltmeter

galvanometer

avo-meter

For the conversion of galvanometer into voltmeter, we connect a

Choose an answer

small resistance in series with galvanometer

small resistance in parallel with galvanometer

high resistance in parallel with galvanometer

high resistance series with galvanometer

The permeability of free space is measured in:

Choose an answer

Wb/Am

Wb A/m

Am/Wb

m/Web A

None of these

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Choose an answer

90°

75°

0°

180°

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 total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Choose an answer

magnetic flux

magnetic flux density

magnetic induction

magnetic field intensity

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

Choose an answer

loop

circle

bar magnet

none of these

The direction of lines of force depends upon the direction of

Choose an answer

voltage

current

charges

none of these

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

Choose an answer

F = B²

F = 0

F = B

F = B/2

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

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 galvanometer is an instrument used to

Choose an answer

measure voltage across a circuit

detect current in a circuit

measure current flowing through a circuit

none of these

The field around a moving charge is called

Choose an answer

magnetic field

conservative field

non-conservative field

none of these

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

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

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