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

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

Question # 2

Amperean path is a:

Question # 3

If current through conductor is 1 A and length of conductor is 1m placed at right angle to the magnetic field, then the strength of magnetic field is

Question # 4

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

Question # 5

The unit of flux density is also given by

Question # 6

Ammeter is used to measure

Question # 7

The pointer of a magnetic compass:

Question # 8

The voltage increases linearly with

Question # 9

The most suitable material for permanent magnet is

Question # 10

The field around a moving charge is called

Question # 11

The current sensitivity of the galvanometer is

Question # 12

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

Question # 13

Current is measured in

Question # 14

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

Question # 15

The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon

Question # 16

The sources of magnetic field are

Question # 17

A solenoid is a coil of wire which is:

Question # 18

The torque per unit twist of coil is called

Question # 19

A resistance used in voltmeter is called

Question # 20

The unit of magnetic flux is

Question # 21

The force acting on a charge moving in a magnetic field

Question # 22

The SI unit of magnetic induction is tesla which is equal to

Question # 23

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 # 24

A full-scale deflection is obtained in a galvanometer with a current of few

Question # 25

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

Question # 26

A current carrying conductor sets up its own:

Question # 27

Galvanometer is a device used for the detection of

Question # 28

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

Question # 29

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 30

The gavanometer constant of a moving coil galvanometer is given by

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
2 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
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 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
5 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:
A. -y direction
B. +y direction
C. +z direction
D. -z direction
6 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
7 The force experienced by charged particle is maximum, if it moves
A. parallel to magnetic field
B. perpendicular to magnetic field
C. opposite to the magnetic field
D. none of these
8 The magnetic field in the middle of a solenoid due to current is
A. weak
B. strong and uniform
C. none-uniform
D. zero
9 A meter wire carraying a current of 2A is at right angle to the uniform magnetic field of 0.5 Weber/m2The force on the wire is
A. 5N
B. 4N
C. 1.5N
D. 6N
10 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these

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