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

NmA-1 is commonly called:

Question # 2

Which is modified form of galvanometer

Question # 3

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

Question # 4

A beam of electrons is provided by an

Question # 5

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

Question # 6

Tesla is the unit of

Question # 7

In the region surrounding a current carrying wire:

Question # 8

For measuring large currents, an ordinary galvanometer cannot be used without proper, then both relates with each other as

Question # 9

The SI unit of flux density is.

Question # 10

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

Question # 11

The current is measured in

Question # 12

Resistance is measured in

Question # 13

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

Question # 14

The unit of flux density is also given by

Question # 15

The most suitable material for permanent magnet is

Question # 16

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

Question # 17

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 # 18

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

Question # 19

Ammeter is used to measure

Question # 20

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

Question # 21

The SI unit of flux density is

Question # 22

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

Question # 23

The force acting on a charge moving in a magnetic field

Question # 24

The current sensitivity of the galvanometer is

Question # 25

The unit of magnetic flux is

Question # 26

A resistance used in voltmeter is called

Question # 27

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 # 28

The force experienced by charged particle is maximum, if it moves

Question # 29

A resistance used in galvanometer to make it voltmeter is called

Question # 30

A current carrying conductor sets up its own:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A current carrying conductor sets up its own:
A.

Electric field

B.

Nuclear field

C.

Magnetic field

D.

Both (A) and (C)
2 The vector representation of force experience give the direction of
A. magnetic field
B. current
C. length of conductor
D. force
3 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
4 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
5 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
6 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
7 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
8 The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called
A. magnetic flux
B. magnetic flux density
C. magnetic induction
D. magnetic field intensity
9 A relationship between Gauses of magnetic induction and Tesla(T) is given by
A. G 10-3T
B. G = 10-2T
C. G = 10-4T
D. G = 10-1T
10 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid

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