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

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

Question # 2

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

Question # 3

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

Question # 4

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 5

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

Question # 6

The gavanometer constant of a moving coil galvanometer is given by

Question # 7

Centripetal force for electron is given by

Question # 8

A long wire wound tightly on a cylindrical core is called:

Question # 9

Electron gun consist of

Question # 10

NmA-1 is commonly called:

Question # 11

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

Question # 12

A resistance used in voltmeter is called

Question # 13

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

Question # 14

Weber is a unit of

Question # 15

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

Question # 16

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:

Question # 17

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

Question # 18

The unit of flux density is also given by

Question # 19

The SI unit of flux density is.

Question # 20

Current is measured in

Question # 21

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 # 22

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 23

The SI unit of magnetic permeability is

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

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 # 28

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

Question # 29

Lorentz force is defined as

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 When current passes through a solenoid coil, it behaves like a
A. loop
B. circle
C. bar magnet
D. none of these
2 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
A. F = B2
B. F = 0
C. F = B
D. F = B/2
3 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
4 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
5 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
6 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
7 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
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 Galvanometer is a device used for the detection of
A. voltage
B. current
C. temperature
D. pressure
10 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them

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