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

Which one of the following relations is correct?

Question # 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:

Question # 4

Lorentz force is defined as

Question # 5

The most suitable material for permanent magnet is

Question # 6

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

Question # 7

The pointer of a magnetic compass:

Question # 8

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

Question # 9

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

Question # 10

Galvanometer is a device used for the detection of

Question # 11

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

Question # 12

Ammeter is used to measure

Question # 13

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

Question # 14

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

Question # 15

The unit of flux density is also given by

Question # 16

The torque per unit twist of coil is called

Question # 17

The angle of deflection of coil can be measured by the

Question # 18

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

Question # 19

NmA-1 is commonly called:

Question # 20

The SI unit of magnetic permeability is

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

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 # 23

Centripetal force for electron is given by

Question # 24

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

Question # 25

The magnetic field outside the solenoid due to current is

Question # 26

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

Question # 27

The magnetic field in the middle of a solenoid due to current is

Question # 28

The magnetic field inside a solenoid can be increased by:

Question # 29

Weber is a unit of

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as
A. modification
B. voltage
C. current
D. resistance
2 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
3 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
4 (CRO) Cathode ray oscilloscope is a device used for high speed
A. velocity
B. graph plotting
C. time-velocity
D. none of these
5 A current carrying conductor sets up its own:
A.

Electric field

B.

Nuclear field

C.

Magnetic field

D.

Both (A) and (C)
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 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
8 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
9 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
10 The current sensitivity of the galvanometer is
A. C/BAN
B. BAN/C
C. CAN/B
D. CBN/A

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