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

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

Question # 2

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 3

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Question # 4

The most suitable material for permanent magnet is

Question # 5

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 6

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

Question # 7

The vector representation of force experience give the direction of

Question # 8

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 # 9

The torque per unit twist of coil is called

Question # 10

The gavanometer constant of a moving coil galvanometer is given by

Question # 11

The direction of lines of force depends upon the direction of

Question # 12

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

Question # 13

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 # 14

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

Question # 15

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

Question # 16

A solenoid is a coil of wire which is:

Question # 17

The pointer of a magnetic compass:

Question # 18

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

Question # 19

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

Question # 20

It is customary represent a current flowing towards the reader by a symbol

Question # 21

The current sensitivity of the galvanometer is

Question # 22

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

Question # 23

The magnetic field in the middle of a solenoid due to current is

Question # 24

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 # 25

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

Question # 26

Method "lamp and scale arrangement" used to measure the

Question # 27

Magnetic induction is also called as:

Question # 28

Magnetic flux and flux density are related by

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic flux is
A. NmA-2
B. NmA-1
C. NAm-1
D. Nm2A-1
2 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
3 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
4 The SI unit of magnetic induction is
A. Gauses
B. Tesla
C. Weber
D. Weber2
5 Strength of magnetic field is measured in SI units, in:
A. N
B. N/Am
C. Am/N
D. Nm/A
6 The strength of magnetic field around the current conductor is
A. Smaller near the conductor
B. Greater near the conductor
C. Greater at the large distance from the conductor
D. Constant near and away from the conductor
7 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
A. magnetic flux
B. magnetic induction
C. magnetic field
D. self inductance
8 When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
A. changed
B. zero
C. unchanged
D. none of these
9 The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above
10 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

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