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

The magnetic field inside a solenoid can be increased by:

Question # 2

The SI unit of flux density is.

Question # 3

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

Question # 4

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 5

The CRO is used for displaying the waveform of a given

Question # 6

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 # 7

The current is measured in

Question # 8

The vector representation of force experience give the direction of

Question # 9

Electron gun consist of

Question # 10

Avo-meter is used of measure the

Question # 11

Lorentz force is defined as

Question # 12

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

Question # 13

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

Question # 14

A galvanometer is an instrument used to

Question # 15

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

Question # 16

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 # 17

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

Question # 18

The angle of deflection of coil can be measured by the

Question # 19

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Question # 20

A resistance used in galvanometer to make it voltmeter is called

Question # 21

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

Question # 22

To convert galvanometer into ammeter we connect

Question # 23

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 24

magnetic field is a:

Question # 25

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

Question # 26

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 # 27

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

Question # 28

The direction of lines of force depends upon the direction of

Question # 29

The working of galvanometer depends upon torque exerted on a current carrying coil in

Question # 30

Which one of the following relations is correct?

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
2 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
3 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
4 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
5 A solenoid is a coil of wire which is:
A.

Short, loosely wound, cylindrical

B.

Long, tightly wound, spherical

C.

Long, loosely wound, cylindrical

D.

Long, tightly wound, cylindrical
6 A resistance used in voltmeter is called
A. shunt resistance
B. high resistance
C. low resistance
D. zero resistance
7 Centripetal force for electron is given by
A. mv2/ r
B. mv / r2
C. mv2/ r
D. mr2/ v
8

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
9 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
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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