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

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 # 2

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

Question # 3

A voltmeter is used to measure the

Question # 4

The voltage increases linearly with

Question # 5

The SI unit of magnetic permeability is

Question # 6

The angle of deflection of coil can be measured by the

Question # 7

Avo-meter is used of measure the

Question # 8

The unit of magnetic flux is

Question # 9

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

Question # 10

The force experienced by an electron projected in a magnetic field B with a velocity V is given by

Question # 11

Electron gun consist of

Question # 12

The pointer of a magnetic compass:

Question # 13

Tesla is the unit of

Question # 14

The field around a moving charge is called

Question # 15

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

Question # 16

In a moving coil galvanometer, the deflecting couple depends upon

Question # 17

A resistance used in galvanometer to make it voltmeter is called

Question # 18

A beam of electrons is provided by an

Question # 19

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

Question # 20

A field is uniform and much stronger:

Question # 21

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

Question # 22

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

Question # 23

In the region surrounding a current carrying wire:

Question # 24

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

Question # 25

Which one of the following relations is correct?

Question # 26

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 # 27

The sources of magnetic field are

Question # 28

Magnetic lines of force:

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 NmA-1 is commonly called:
A. Weber
B. Apmere
C. Guass
D. Coulomb
2 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
3 How many number of anodes used in electron gun
A. one
B. two
C. three
D. six
4 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
5 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
6 The voltage increases linearly with
A. time
B. velocity
C. acceleration
D. torque
7 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:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
8 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
9 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
10 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge

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