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 field is uniform and much stronger:

Question # 2

The strength of magnetic field around the current conductor is

Question # 3

Method "lamp and scale arrangement" used to measure the

Question # 4

CRO deflects the beam of

Question # 5

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 # 6

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

Question # 7

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

Question # 8

Amperean path is a:

Question # 9

The most suitable material for permanent magnet is

Question # 10

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

Question # 11

NmA-1 is commonly called:

Question # 12

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 # 13

The SI unit of magnetic flux is

Question # 14

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

Question # 15

Flurescent screen is a screen where visible spot

Question # 16

The SI unit of flux density is.

Question # 17

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

Question # 18

The current sensitivity of the galvanometer is

Question # 19

Magnetic induction is also called as:

Question # 20

Weber is a unit of

Question # 21

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

Question # 22

The magnetic field outside the solenoid due to current is

Question # 23

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

Question # 24

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

Question # 25

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

Question # 26

Lorentz force is defined as

Question # 27

The current is measured in

Question # 28

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

Question # 29

The SI unit of magnetic permeability is

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Magnetic lines of force:
A.

Cannot intersect at all

B.

Intersect at infinity

C.

Intersect within magnet

D.

Intersect at Neutral Point
2 In the region surrounding a current carrying wire:
A. A magnetic field is setup

B.

The lines of force are elliptical

C.

Direction of lines of forces depends upon direction of current

D.

Both (A) and (C)
3 Magnetic flux and flux density are related by
A. Flux density = flux x area
B. Flux density = flux / area
C. Flux density = flux - area
D. None of these
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 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
7 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
8 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
9 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
10 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

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