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

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 # 2

NmA-1 is commonly called:

Question # 3

The SI unit of magnetic induction is

Question # 4

A resistance used in voltmeter is called

Question # 5

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

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

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 # 8

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

Question # 9

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

Question # 10

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

Question # 11

When current passes through a solenoid coil, it behaves like a

Question # 12

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

Question # 13

if the field is directed along the normal to the area, then flux is:

Question # 14

The direction of lines of force depends upon the direction of

Question # 15

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

Question # 16

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

Question # 17

The angle of deflection of coil can be measured by the

Question # 18

A field is uniform and much stronger:

Question # 19

In the formula B= µ̻ nl, the symbol n denotes:

Question # 20

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 # 21

Centripetal force for electron is given by

Question # 22

The SI unit of magnetic permeability is

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

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

Question # 27

The pointer of a magnetic compass:

Question # 28

The unit of magnetic flux is

Question # 29

Ammeter is used to measure

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero
2 When an electron enters in a magnetic field right angle to its motion, the magnitude of its velocity will be
A. changed
B. zero
C. unchanged
D. none of these
3 Which one of the following relations is correct?
A. 1 Wb-m2= Nm-1A-1
B. 1 tesla = 104 gausses
C. 1 Wb-m2= 1 tesla
D. All of the above
4 A galvanometer is an instrument used to
A. measure voltage across a circuit
B. detect current in a circuit
C. measure current flowing through a circuit
D. none of these
5 The strength of magnetic field around the current conductor is
A. Smaller near the conductor
B. Greater near the conductor
C. Greater at the large distance from the conductor
D. Constant near and away from the conductor
6 The working of galvanometer depends upon torque exerted on a current carrying coil in
A. magnetic field
B. electric field
C. gravitational field
D. nuclear field
7 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
8 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
9 When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into
A. Voltmeter
B. Avometer
C. Ammeter
D. None of these
10

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

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