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

Flurescent screen is a screen where visible spot

Question # 2

magnetic field is a:

Question # 3

Weber is a unit of

Question # 4

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

Question # 5

The SI unit of magnetic flux is.

Question # 6

The direction of lines of force depends upon the direction of

Question # 7

The force acting on a charge moving in a magnetic field

Question # 8

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

Question # 9

The SI unit of flux density is

Question # 10

Magnetic flux and flux density are related by

Question # 11

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 12

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

Question # 13

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

Question # 14

NmA-1 is commonly called:

Question # 15

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

Question # 16

The SI unit of magnetic permeability is

Question # 17

The CRO deflects the beam of electrons, when they passes through uniform

Question # 18

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

Question # 19

Current is measured in

Question # 20

A solenoid is a coil of wire which is:

Question # 21

The gavanometer constant of a moving coil galvanometer is given by

Question # 22

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 # 23

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 # 24

A resistance used in galvanometer to make it voltmeter is called

Question # 25

Galvanometer is a device used for the detection of

Question # 26

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

Question # 27

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

Question # 28

F = I(L x B) is a

Question # 29

Which one of the following relations is correct?

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
2 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
3 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
4 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
5 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
6 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
7 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
8 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
9 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
A. F = B2
B. F = 0
C. F = B
D. F = B/2
10 A field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid

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