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

Centripetal force for electron is given by

Question # 2

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

Question # 3

Weber is a unit of

Question # 4

Tesla is the unit of

Question # 5

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 # 6

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

Question # 7

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

Question # 8

Magnetic lines of force:

Question # 9

A solenoid is a coil of wire which is:

Question # 10

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

Question # 11

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

Question # 12

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

Question # 13

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 # 14

The SI unit of magnetic flux is.

Question # 15

The CRO is used for displaying the waveform of a given

Question # 16

In a moving coil galvanometer, the deflecting couple depends upon

Question # 17

Resistance is measured in

Question # 18

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 19

In the expression of force experienced by electron, the direction of both v and B are

Question # 20

The strength of magnetic field around the current conductor is

Question # 21

A resistance used in voltmeter is called

Question # 22

Lorentz force is defined as

Question # 23

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 # 24

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

Question # 25

The force acting on a charge moving in a magnetic field

Question # 26

The most suitable material for permanent magnet is

Question # 27

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

Question # 28

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 # 29

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as
A. IT = 10-4 G
B. IT = 105G
C. IT = 103G
D. IT = 104G
2

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

Circular and endless

B.

Oval in shape and endless

C.

Straight

D.

Parabolic
3 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
4 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
5 Strength of magnetic field is measured in SI units, in:
A. N
B. N/Am
C. Am/N
D. Nm/A
6 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
7 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
8 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
9 Lorentz force is defined as
A. q(E + V x B)
B. q(E x B + V)
C. q(E x V + B)
D. q(E x B)
10 A charged particle moving at right angle to the magnetic field will experience
A. minimum force
B. maximum force
C. zero
D. moderate force

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