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

The current sensitivity of the galvanometer is

Question # 2

In a moving coil galvanometer, the deflecting couple depends upon

Question # 3

The voltage increases linearly with

Question # 4

The current is measured in

Question # 5

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

Question # 6

How many number of anodes used in electron gun

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

Magnetic induction is also called as:

Question # 9

F = I(L x B) is a

Question # 10

Current is measured in

Question # 11

The gavanometer constant of a moving coil galvanometer is given by

Question # 12

A solenoid is a coil of wire which is:

Question # 13

The SI unit of magnetic flux is

Question # 14

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

Question # 15

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

Question # 16

The force acting on a charge moving in a magnetic field

Question # 17

The most suitable material for permanent magnet is

Question # 18

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 # 19

Which one of the following relations is correct?

Question # 20

Magnetic flux and flux density are related by

Question # 21

The SI unit of magnetic induction is

Question # 22

The sources of magnetic field are

Question # 23

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 # 24

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

Question # 25

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 # 26

The permeability of free space is measured in:

Question # 27

For the conversion of galvanometer into voltmeter, we connect a

Question # 28

A resistance used in voltmeter is called

Question # 29

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

Question # 30

The SI unit of magnetic permeability is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In the region surrounding a current carrying wire:
A. A magnetic field is setup

B.

The lines of force are elliptical

C.

Direction of lines of forces depends upon direction of current

D.

Both (A) and (C)
2 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
3 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
4 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
5 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
6 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
7 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
8 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
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 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v

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