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 resistance used in voltmeter is called

Question # 2

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

Question # 3

Magnetic flux and flux density are related by

Question # 4

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

Question # 5

The SI unit of magnetic induction is

Question # 6

Which one of the following relations is correct?

Question # 7

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 8

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 9

The angle of deflection of coil can be measured by the

Question # 10

The SI unit of magnetic permeability is

Question # 11

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

Question # 12

Electron gun consist of

Question # 13

Galvanometer is a device used for the detection of

Question # 14

A current carrying conductor sets up its own:

Question # 15

Flurescent screen is a screen where visible spot

Question # 16

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

Question # 17

Charge to mass ratio (e/m) of an electron is given by the relation

Question # 18

The current is measured in

Question # 19

Avo-meter is used of measure the

Question # 20

A field is uniform and much stronger:

Question # 21

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

Question # 22

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

Question # 23

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

Question # 24

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

Question # 25

A solenoid is a coil of wire which is:

Question # 26

A full-scale deflection is obtained in a galvanometer with a current of few

Question # 27

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 # 28

Tesla is the unit of

Question # 29

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 30

A beam of electrons is provided by an

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:
A.

Thumb

B.

Curled fingers

C.

Middle finger

D.

Arm of right hand
2 A resistance used in galvanometer to make it voltmeter is called
A. shunt resistance
B. high resistance
C. zero resistance
D. none of these
3 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
4 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
5 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
6 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
7 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
8 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
A. Voltmeter
B. Avometer
C. Ammeter
D. None of these
9 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
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:
A. -y direction
B. +y direction
C. +z direction
D. -z direction

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