ECAT Pre General Science Physics Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Pre General Science Physics Chapter 14 Electromagnetism

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ECAT Pre General Science Physics Chapter 14 Electromagnetism

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Question # 1

Which is modified form of galvanometer

Question # 2

In the formula B= µ̻ nl, the symbol n denotes:

Question # 3

if the field is directed along the normal to the area, then flux is:

Question # 4

A solenoid is a coil of wire which is:

Question # 5

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 6

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

Question # 7

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

Question # 8

The SI unit of magnetic permeability is

Question # 9

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

Question # 10

The current is measured in

Question # 11

Method "lamp and scale arrangement" used to measure the

Question # 12

The vector representation of force experience give the direction of

Question # 13

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

Question # 14

Resistance is measured in

Question # 15

A resistance used in galvanometer to make it voltmeter is called

Question # 16

The SI unit of flux density is

Question # 17

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 18

Lorentz force is defined as

Question # 19

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 20

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

Question # 21

Avo-meter is used of measure the

Question # 22

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 23

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

Question # 24

A field is uniform and much stronger:

Question # 25

The SI unit of magnetic flux is

Question # 26

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

Question # 27

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

Question # 28

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

Question # 29

The angle of deflection of coil can be measured by the

Question # 30

Centripetal force for electron is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
2 A field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid
3 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
4

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field
5

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

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
6 The working of galvanometer depends upon torque exerted on a current carrying coil in
A. magnetic field
B. electric field
C. gravitational field
D. nuclear field
7 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
8 If the number of turns of a solenoid (carrying a steady current I) is doubled without changing the length of a solenoid, then magnetic field:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
9 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
10 41 The force experience, when proton projected in a magnetic field with velocity 'v' is
A. +e(v x B)
B. -C(V x B)
C. +e2(v x B)
D. -e(v2x B)

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