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

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

Question # 2

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 # 3

A solenoid is a coil of wire which is:

Question # 4

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

Question # 5

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

Question # 6

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

Question # 7

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

Question # 8

Resistance is measured in

Question # 9

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 10

How many number of anodes used in electron gun

Question # 11

When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be

Question # 12

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

Question # 13

F = I(L x B) is a

Question # 14

A resistance used in galvanometer to make it voltmeter is called

Question # 15

The pointer of a magnetic compass:

Question # 16

Tesla is the unit of

Question # 17

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

Question # 18

Flurescent screen is a screen where visible spot

Question # 19

The vector representation of force experience give the direction of

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

Lorentz force is defined as

Question # 24

A charged particle moving at right angle to the magnetic field will experience

Question # 25

It is customary represent a current flowing towards the reader by a symbol

Question # 26

The direction of lines of force depends upon the direction of

Question # 27

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

Question # 28

Which is modified form of galvanometer

Question # 29

The voltage increases linearly with

Question # 30

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
2 The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by
A. F =q(v/B)
B. F=q2(v x B)
C. F=q(v x B)
D. F= vx B
3 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
4 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
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
5

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
6 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
7 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
8 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
9 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum
10 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point

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