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

Question # 2

Ammeter is used to measure

Question # 3

In a moving coil galvanometer, the deflecting couple depends upon

Question # 4

The vector representation of force experience give the direction of

Question # 5

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

Question # 6

Current is measured in

Question # 7

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 8

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

Question # 9

if the field is directed along the normal to the area, then flux is:

Question # 10

A resistance used in galvanometer to make it voltmeter is called

Question # 11

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 # 12

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 13

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

Question # 14

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 15

Flurescent screen is a screen where visible spot

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The torque per unit twist of coil is called
A. proportionality constant
B. gravitational constant
C. boltzman constant
D. coupling constant
2 Galvanometer is a device used for the detection of
A. voltage
B. current
C. temperature
D. pressure
3 A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is
A. 5N
B. 4N
C. 1.5N
D. 6N
4 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
5 At a given instant, a photon moves in +x direction in a region where there magnetic field in -z direction. The magnetic force on the proton will be the:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
6 If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made
A. Sensitive
B. Accurate
C. Stable
D. None of these
7 The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above
8 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
9 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
A. n/AL
B. Al/n
C. nAL
D. nA/L
10

The pointer of a magnetic compass:
A.

Is affected only by permanent magnets

B.

Align itself parallel to the applied magnetic field

C.

Vibrates in the magnetic field of the current

D.

Aligns itself perpendicular to the magnetic field

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