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

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

Question # 2

In the region surrounding a current carrying wire:

Question # 3

Resistance is measured in

Question # 4

The vector representation of force experience give the direction of

Question # 5

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

Question # 6

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 # 7

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

Question # 8

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

Question # 9

The SI unit of magnetic induction is tesla which is equal to

Question # 10

A voltmeter is used to measure the

Question # 11

Avo-meter is used of measure the

Question # 12

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 # 13

The strength of magnetic field around the current conductor is

Question # 14

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Question # 15

A shunt resistance parallel to the galvanometer is used to convert it into

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

A current carrying conductor sets up its own:

Question # 20

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 # 21

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:

Question # 22

The SI unit of magnetic flux is.

Question # 23

A resistance used in voltmeter is called

Question # 24

F = I(L x B) is a

Question # 25

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 26

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

Question # 27

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 28

A beam of electrons is provided by an

Question # 29

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

Question # 30

A long wire wound tightly on a cylindrical core is called:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 How many number of anodes used in electron gun
A. one
B. two
C. three
D. six
3 The direction of lines of force depends upon the direction of
A. voltage
B. current
C. charges
D. none of these
4 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
5 The CRO deflects the beam of electrons, when they passes through uniform
A. electric field
B. gravitational field
C. magnetic flax
D. magnetic field
6 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
7 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
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
8 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
9 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G
10 The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by
A. F=eVB
B. F=e2V/B
C. F=e/VB
D. F=B2/ev

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