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

Magnetic lines of force:

Question # 2

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

Question # 3

NmA-1 is commonly called:

Question # 4

The SI unit of magnetic flux is

Question # 5

The CRO deflects the beam of electrons, when they passes through uniform

Question # 6

Method "lamp and scale arrangement" used to measure the

Question # 7

The SI unit of flux density is.

Question # 8

The CRO is used for displaying the waveform of a given

Question # 9

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

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 14

The SI unit of magnetic permeability is

Question # 15

Galvanometer is a device used for the detection of

Question # 16

A galvanometer is an instrument used to

Question # 17

A field is uniform and much stronger:

Question # 18

The torque per unit twist of coil is called

Question # 19

Amperean path is a:

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

The force acting on a charge moving in a magnetic field

Question # 24

Strength of magnetic field is measured in SI units, in:

Question # 25

A resistance used in galvanometer to make it voltmeter is called

Question # 26

Which one of the following relations is correct?

Question # 27

The vector representation of force experience give the direction of

Question # 28

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

Question # 29

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

Question # 30

The current sensitivity of the galvanometer is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 How many number of anodes used in electron gun
A. one
B. two
C. three
D. six
3 Current is measured in
A. volts
B. watt
C. ohm
D. ampere
4 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:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
5 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
6 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
7 Magnetic flux and flux density are related by
A. Flux density = flux x area
B. Flux density = flux / area
C. Flux density = flux - area
D. None of these
8 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
9 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
10 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these

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