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

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

Question # 2

The force experienced by charged particle is maximum, if it moves

Question # 3

The current is measured in

Question # 4

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

Question # 5

Flurescent screen is a screen where visible spot

Question # 6

The permeability of free space is measured in:

Question # 7

Which is modified form of galvanometer

Question # 8

A beam of electrons is provided by an

Question # 9

Method "lamp and scale arrangement" used to measure the

Question # 10

At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:

Question # 11

The SI unit of magnetic flux is.

Question # 12

A resistance used in voltmeter is called

Question # 13

The SI unit of magnetic flux is

Question # 14

CRO deflects the beam of

Question # 15

The SI unit of magnetic permeability is

Question # 16

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

Question # 17

The SI unit of flux density is

Question # 18

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

Question # 19

NmA-1 is commonly called:

Question # 20

Magnetic flux and flux density are related by

Question # 21

The torque per unit twist of coil is called

Question # 22

A galvanometer is an instrument used to

Question # 23

The voltage increases linearly with

Question # 24

Ammeter is used to measure

Question # 25

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 # 26

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

Question # 27

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

Question # 28

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

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
2 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
3 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
4 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
5 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
6 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
7 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
8 In a straight current carrying conductor, the direction of magnetic field can be found by
A. right hand rule
B. left hand rule
C. head to tall rule
D. none of these
9 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
10 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made
A. Sensitive
B. Accurate
C. Stable
D. None of these

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