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

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 2

A resistance used in voltmeter is called

Question # 3

A field is uniform and much stronger:

Question # 4

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

Question # 5

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

Question # 6

In the expression of force experienced by electron, the direction of both v and B are

Question # 7

The SI unit of flux density is.

Question # 8

Magnetic induction is also called as:

Question # 9

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

Question # 10

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

Question # 11

Lorentz force is defined as

Question # 12

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 13

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

Question # 14

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

Question # 15

Magnetic flux and flux density are related by

Question # 16

The current sensitivity of the galvanometer is

Question # 17

Amperean path is a:

Question # 18

The SI unit of magnetic induction is

Question # 19

The current is measured in

Question # 20

The torque per unit twist of coil is called

Question # 21

A voltmeter is used to measure the

Question # 22

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

Question # 23

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 # 24

The most suitable material for permanent magnet is

Question # 25

The strength of magnetic field around the current conductor is

Question # 26

magnetic field is a:

Question # 27

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 28

The SI unit of magnetic permeability is

Question # 29

Which is modified form of galvanometer

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
3 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
4 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
5 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
6 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
7 The current is measured in
A. volts
B. watt
C. ampere
D. ohm
8 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
9 The SI unit of magnetic induction is
A. Gauses
B. Tesla
C. Weber
D. Weber2
10 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

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