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

If volume of wire is 'AL' and there are 'n' numbers of charge carriers per unit volume, then the total number of charge carriers are

Question # 2

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

Question # 3

The unit of flux density is also given by

Question # 4

The magnetic field inside a solenoid can be increased by:

Question # 5

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

Question # 6

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

Question # 7

Magnetic induction is also called as:

Question # 8

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

Question # 9

A resistance used in galvanometer to make it voltmeter is called

Question # 10

The CRO is used for displaying the waveform of a given

Question # 11

Magnetic lines of force:

Question # 12

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 13

The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed

Question # 14

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

Question # 15

The magnetic field outside the solenoid due to current is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 magnetic field is a:
A.

Vector quantity

B.

Scalar quantity

C.

Scalar as well as scalar quantity

D.

Any of (A) or (B)
3 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
4 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
5 The working of galvanometer depends upon torque exerted on a current carrying coil in
A. magnetic field
B. electric field
C. gravitational field
D. nuclear field
6 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these
7 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
8 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
9 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
10 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

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