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

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:

Question # 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:

Question # 3

The e/m of an electron moving in a circular path in a magnetic field is equal to

Question # 4

Magnetic lines of force:

Question # 5

The current in microamperes required to produce one millimeter deflection on a scale placed one meter away from the mirror of the galvanometer, defined the sensitivity of

Question # 6

The SI unit of magnetic permeability is

Question # 7

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

Question # 8

Ammeter is used to measure

Question # 9

The SI unit of flux density is

Question # 10

NmA-1 is commonly called:

Question # 11

The unit of magnetic flux is

Question # 12

A galvanometer is an instrument used to

Question # 13

When some compass needles are placed on a card board along a circle with the center at the wire, they will

Question # 14

To convert galvanometer into ammeter we connect

Question # 15

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

Question # 16

A field is uniform and much stronger:

Question # 17

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

Question # 18

A voltmeter is used to measure the

Question # 19

The most suitable material for permanent magnet is

Question # 20

Which is modified form of galvanometer

Question # 21

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

Question # 22

The angle of deflection of coil can be measured by the

Question # 23

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

Question # 24

The force experienced by charged particle is maximum, if it moves

Question # 25

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 26

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 # 27

The strength of magnetic field around the current conductor is

Question # 28

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

Question # 29

Which one of the following relations is correct?

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
2 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
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 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
5 Strength of magnetic field is measured in SI units, in:
A. N
B. N/Am
C. Am/N
D. Nm/A
6 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
7 In a straight current carrying conductor, the direction of magnetic field can be found by
A. right hand rule
B. left hand rule
C. head to tall rule
D. none of these
8 Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:
A. Maximum
B. Minimum
C. Zero
D. Very small
9 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
10 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:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth

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