ECAT Pre Computer Science Chapter 14 MCQ Test With Answer

MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

Try The MCQ's Test For ECAT Physics Chapter 14 Electromagnetism

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ECAT Physics Chapter 14 Electromagnetism

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Question # 1

The SI unit of flux density is

Question # 2

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

Question # 3

The angle of deflection of coil can be measured by the

Question # 4

For the conversion of galvanometer into voltmeter, we connect a

Question # 5

Electron gun consist of

Question # 6

In the formula B= µ̻ nl, the symbol n denotes:

Question # 7

The permeability of free space is measured in:

Question # 8

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

Question # 9

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 10

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

Question # 11

How many number of anodes used in electron gun

Question # 12

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

Question # 13

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

Question # 14

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

Question # 15

Galvanometer is a device used for the detection of

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of magnetic induction is tesla which is equal to
A. Newton/ampere-meter or N/A-m
B. Newton/ampere2-meter or N/A2-m
C. Newton/ampere2-meter2 or N/A2-m2
D. Newton/ampere2-meter2or N/A2-m2
2 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
3 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
4 The CRO deflects the beam of electrons, when they passes through uniform
A. electric field
B. gravitational field
C. magnetic flax
D. magnetic field
5 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
6 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
7 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum
8 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
9 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
10 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

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