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

Question # 2

A resistance used in galvanometer to make it voltmeter is called

Question # 3

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

Question # 4

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

Question # 5

The current is measured in

Question # 6

A voltmeter is used to measure the

Question # 7

The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called

Question # 8

A field is uniform and much stronger:

Question # 9

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

Question # 10

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

Question # 11

A current carrying conductor is placed at right angle to the magnetic field. The magnetic force experienced by the conductor is

Question # 12

Which is modified form of galvanometer

Question # 13

The magnetic field inside a solenoid can be increased by:

Question # 14

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

Question # 15

When current passes through a solenoid coil, it behaves like a

Question # 16

Electron gun consist of

Question # 17

The force acting as one meter length of the conductor placed at right angle to the magnetic field, when one A current is passing through it, defines the

Question # 18

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

Question # 19

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 # 20

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

Question # 21

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

Question # 22

A charged particle moving at right angle to the magnetic field will experience

Question # 23

The SI unit of flux density is

Question # 24

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 # 25

The force experienced by a single charge carrier moving with velocity 'v' i magnetic field of strength 'B' is given by

Question # 26

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

Question # 27

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

Question # 28

A beam of electrons is provided by an

Question # 29

Ammeter is used to measure

Question # 30

The magnetic field outside the solenoid due to current is

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The force acting on a charge moving in a magnetic field
A. is perpendicular to the both magnetic field and direction of motion
B. is proportional to the magnetic of charges
C. vanishes when the motion is directly opposite to the direction of field
D. all of the above
2 It is customary represent a current flowing towards the reader by a symbol
A. (x)
B. (+)
C. (.)
D. (-)
3 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
4 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
5 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
6 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)
7 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
8 Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:
A. Maximum
B. Minimum
C. Zero
D. Very small
9 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
A. n/AL
B. Al/n
C. nAL
D. nA/L
10 For the conversion of galvanometer into voltmeter, we connect a
A. small resistance in series with galvanometer
B. small resistance in parallel with galvanometer
C. high resistance in parallel with galvanometer
D. high resistance series with galvanometer

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