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

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

Question # 2

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

Question # 3

The SI unit of magnetic flux is

Question # 4

The force acting on a charge moving in a magnetic field

Question # 5

In the expression of force experienced by electron, the direction of both v and B are

Question # 6

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

Question # 7

41 The force experience, when proton projected in a magnetic field with velocity 'v' is

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

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 # 12

Flurescent screen is a screen where visible spot

Question # 13

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

Question # 14

The torque per unit twist of coil is called

Question # 15

The voltage increases linearly with

Question # 16

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

Question # 17

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

Question # 18

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

Question # 19

The sources of magnetic field are

Question # 20

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

Question # 21

Resistance is measured in

Question # 22

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

Question # 23

Tesla is the unit of

Question # 24

The most suitable material for permanent magnet is

Question # 25

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

Question # 26

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

Question # 27

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

Question # 28

A field is uniform and much stronger:

Question # 29

A shunt resistance parallel to the galvanometer is used to convert it into

Question # 30

A beam of electrons is provided by an

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
2 A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is
A. minimum
B. maximum
C. zero
D. none of these
3 CRO deflects the beam of
A. proton
B. a-particle
C. electron
D. neutron
4 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:
A. Becomes Half
B. Becomes double
C. Is not affected
D. Becomes one fourth
5 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
6 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
7 Total number of turns on 0.15 m length solenoid is 300. the value of n is:
A. Greater than 300
B. Smaller than 300
C. Equal to 300
D. Any of (A) or (B)
8 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
9 Magnetic induction is also called as:
A.

Ampere’s law

B.

Faraday’s law

C.

Lenz’s law

D.

Newton’s law
10 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge

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