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

How many number of anodes used in electron gun

Question # 3

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

Question # 4

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

Question # 5

A beam of electrons is provided by an

Question # 6

Method "lamp and scale arrangement" used to measure the

Question # 7

In a moving coil galvanometer, the deflecting couple depends upon

Question # 8

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

Question # 9

Weber is a unit of

Question # 10

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

Question # 11

The strength of magnetic field around the current conductor is

Question # 12

Tesla is the unit of

Question # 13

Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:

Question # 14

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

Question # 15

The SI unit of flux density is

Question # 16

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

Question # 17

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

Question # 18

The field around a moving charge is called

Question # 19

Ammeter is used to measure

Question # 20

Resistance is measured in

Question # 21

A resistance used in voltmeter is called

Question # 22

Lorentz force is defined as

Question # 23

The unit of magnetic flux is

Question # 24

The sources of magnetic field are

Question # 25

Avo-meter is used of measure the

Question # 26

The most suitable material for permanent magnet is

Question # 27

The SI unit of magnetic flux is

Question # 28

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

Question # 29

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

Question # 30

The force acting on a charge moving in a magnetic field

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 A beam of electrons is provided by an
A. electron gun
B. Suppray
C. Injection
D. None of these
2 In the expression of force experienced by electron, the direction of both v and B are
A. parallel
B. zero
C. perpendicular
D. none of them
3 The current is measured in
A. volts
B. watt
C. ampere
D. ohm
4 A full-scale deflection is obtained in a galvanometer with a current of few
A. ampere
B. volts
C. milliampere
D. ohm
5 The permeability of free space is measured in:
A. Wb/Am
B. Wb A/m
C. Am/Wb
D. m/Web A
6 The SI unit of magnetic flux is.
A. weber
B. Nm-1A-1
C. tesla
D. gauss
7 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
8 The unit of flux density is also given by
A. Weber/m2or Wb . m-2
B. Weber/mor Wb . m
C. Weber/mor Wb . m-1
D. Weber or Wb
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 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them

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