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

How many number of anodes used in electron gun

Question # 2

Galvanometer is a device used for the detection of

Question # 3

Tesla is the unit of

Question # 4

The vector representation of force experience give the direction of

Question # 5

A galvanometer is an instrument used to

Question # 6

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

Question # 7

The SI unit of magnetic permeability is

Question # 8

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

Question # 9

A solenoid is a coil of wire which is:

Question # 10

The SI unit of magnetic induction is tesla which is equal to

Question # 11

Magnetic lines of force:

Question # 12

The galvanometer can be made sensitive if the value of the factor C/BAN is

Question # 13

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

Question # 14

The gavanometer constant of a moving coil galvanometer is given by

Question # 15

The unit of flux density is also given by

Question # 16

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

Question # 17

The sources of magnetic field are

Question # 18

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

Question # 19

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 20

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

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 meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is

Question # 23

The voltage increases linearly with

Question # 24

The angle of deflection of coil can be measured by the

Question # 25

Resistance is measured in

Question # 26

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

Question # 27

F = I(L x B) is a

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 most suitable material for permanent magnet is

Question # 30

A field is uniform and much stronger:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
2 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
3 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
4 The angle of deflection of coil can be measured by the
A. one method
B. three method
C. two method
D. none of these
5 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)
6 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line
7 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
A. dead beat galvanometer
B. stable galvanometer
C. shunt galvanometer
D. sensitive galvanomter
8 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
9 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
10 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

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