ECAT Pre Engineering Physics Chapter 14 MCQ Test With Answer

MCQ's Test For Physics ECAT Pre Engineering Chapter 14 Electromagnetism

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

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Physics ECAT Pre Engineering Chapter 14 Electromagnetism

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Question # 1

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 2

A galvanometer is an instrument used to

Question # 3

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

Question # 4

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

Question # 5

NmA-1 is commonly called:

Question # 6

In a straight current carrying conductor, the direction of magnetic field can be found by

Question # 7

The SI unit of flux density is.

Question # 8

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

Question # 9

The SI unit of flux density is

Question # 10

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

Question # 11

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 12

Current is measured in

Question # 13

The sources of magnetic field are

Question # 14

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

Question # 15

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A
3 The gavanometer constant of a moving coil galvanometer is given by
A. K=BAN/C
B. K=BN/CA
C. K=NAC/B
D. K=C/BAN
4 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
5 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these
6 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force
7 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
8 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
9 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
10 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these

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