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 current is pass through the straight wire. The magnetic field established around it has its lines of force:

Question # 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

Question # 3

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

Question # 4

The angle of deflection of coil can be measured by the

Question # 5

The most suitable material for permanent magnet is

Question # 6

The force acting on a charge moving in a magnetic field

Question # 7

The SI unit of flux density is

Question # 8

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 # 9

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

Question # 10

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

Question # 11

A full-scale deflection is obtained in a galvanometer with a current of few

Question # 12

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

Question # 13

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

Question # 14

How many number of anodes used in electron gun

Question # 15

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

Question # 16

A shunt resistance parallel to the galvanometer is used to convert it into

Question # 17

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

Question # 18

The magnetic field outside the solenoid due to current is

Question # 19

The current sensitivity of the galvanometer is

Question # 20

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

Question # 21

A beam of electrons is provided by an

Question # 22

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

Question # 23

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

Question # 24

Centripetal force for electron is given by

Question # 25

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

Question # 26

The SI unit of magnetic flux is

Question # 27

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 # 28

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

Question # 29

A galvanometer is an instrument used to

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
2 The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called
A. magnetic flux
B. magnetic flux density
C. magnetic induction
D. magnetic field intensity
3 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
4 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
5 The field around a moving charge is called
A. magnetic field
B. conservative field
C. non-conservative field
D. none of these
6 The sources of magnetic field are
A. isolated magnetic poles
B. charges at rest
C. charges in motion
D. none of these
7 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
8 Avo-meter is used of measure the
A. current, voltage
B. voltage, resistance
C. resistance, current
D. current, voltage and resistance
9 The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the
A. magnetic flux
B. magnetic induction
C. magnetic field
D. self inductance
10 When charged particle is projected perpendicular to a uniform magnetic field its trajectory is
A. circular
B. elliptical
C. cycloid
D. straight line

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