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

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

Question # 2

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 # 3

Tesla is the unit of

Question # 4

Galvanometer is a device used for the detection of

Question # 5

(CRO) Cathode ray oscilloscope is a device used for high speed

Question # 6

NmA-1 is commonly called:

Question # 7

The SI unit of magnetic flux is

Question # 8

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 9

A long wire wound tightly on a cylindrical core is called:

Question # 10

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

Question # 11

The strength of magnetic field around the current conductor is

Question # 12

The current sensitivity of the galvanometer is

Question # 13

The CRO deflects the beam of electrons, when they passes through uniform

Question # 14

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

Question # 15

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

Question # 16

The permeability of free space is measured in:

Question # 17

Which is modified form of galvanometer

Question # 18

A field is uniform and much stronger:

Question # 19

A solenoid is a coil of wire which is:

Question # 20

Flurescent screen is a screen where visible spot

Question # 21

When charged particle is projected perpendicular to a uniform magnetic field its trajectory is

Question # 22

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

Question # 23

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 # 24

The magnetic field outside the solenoid due to current is

Question # 25

The SI unit of flux density is

Question # 26

The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by

Question # 27

Weber is a unit of

Question # 28

Method "lamp and scale arrangement" used to measure the

Question # 29

How many number of anodes used in electron gun

Question # 30

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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
2 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
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 In the formula B= µ̻ nl, the symbol n denotes:
A.

Total number of turns of solenoid

B.

Number of turns per unit length

C.

Number of turns per unit volume

D.

Numbers of turns per unit area
5 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
6 A field is uniform and much stronger:
A.

Inside a long solenoid

B.

Outside a long solenoid

C.

At the end of a long solenoid

D.

At the central point of long solenoid
7 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
8 The angle of deflection of coil can be measured by the
A. one method
B. three method
C. two method
D. none of these
9 41 The force experience, when proton projected in a magnetic field with velocity 'v' is
A. +e(v x B)
B. -C(V x B)
C. +e2(v x B)
D. -e(v2x B)
10 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

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