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

Question # 2

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

Question # 3

A current carrying conductor sets up its own:

Question # 4

For the conversion of galvanometer into voltmeter, we connect a

Question # 5

The magnetic field outside the solenoid due to current is

Question # 6

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

Question # 7

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

Question # 8

The current sensitivity of the galvanometer is

Question # 9

A beam of electrons is provided by an

Question # 10

The direction of lines of force depends upon the direction of

Question # 11

The sources of magnetic field are

Question # 12

Electron gun consist of

Question # 13

Magnetic induction is also called as:

Question # 14

Lorentz force is defined as

Question # 15

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

Question # 16

A resistance used in voltmeter is called

Question # 17

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

Question # 18

The SI unit of flux density is

Question # 19

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

Question # 20

NmA-1 is commonly called:

Question # 21

Galvanometer is a device used for the detection of

Question # 22

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

Question # 23

The field around a moving charge is called

Question # 24

Which is modified form of galvanometer

Question # 25

The permeability of free space is measured in:

Question # 26

Resistance is measured in

Question # 27

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

Question # 28

CRO deflects the beam of

Question # 29

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

Question # 30

The SI unit of flux density is.

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
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
A. 5N
B. 4N
C. 1.5N
D. 6N
2 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
3 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer
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 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
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
A. n/AL
B. Al/n
C. nAL
D. nA/L
7 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
8 The galvanometer can be made sensitive if the value of the factor C/BAN is
A. constant
B. small
C. large
D. none of these
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 Tesla is the unit of
A. Magnetic induction or flux density
B. Magnetic flux
C. Self inductance
D. None of these

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