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

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 # 2

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

Question # 3

Method "lamp and scale arrangement" used to measure the

Question # 4

A relationship between Gauses of magnetic induction and Tesla(T) is given by

Question # 5

A current carrying conductor sets up its own:

Question # 6

Ammeter is used to measure

Question # 7

The direction of lines of force depends upon the direction of

Question # 8

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

Question # 9

The most suitable material for permanent magnet is

Question # 10

The magnetic field inside a solenoid can be increased by:

Question # 11

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

Question # 12

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

Question # 13

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

Question # 14

A resistance used in voltmeter is called

Question # 15

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

Question # 16

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

Question # 17

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 # 18

Current is measured in

Question # 19

Galvanometer is a device used for the detection of

Question # 20

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

Question # 21

In the region surrounding a current carrying wire:

Question # 22

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

Question # 23

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

Question # 24

Magnetic flux passing through the an element of are A placed perpendicular to a uniform magnetic field Bis:

Question # 25

Which is modified form of galvanometer

Question # 26

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

Question # 27

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

Question # 28

The magnetic field outside the solenoid due to current is

Question # 29

If the value of galvanometer constant k = C/BAN is made small, the galvanometer can be made

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Hold the solenoid in the right hand with fingers curling in the direction of current. The direction of the field will be given by:
A.

Thumb

B.

Curled fingers

C.

Middle finger

D.

Arm of right hand
2 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
3 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
4 The working of all DC electric meters (galvanometers, ammetersand voltmeters) depends upon
A. Heating effect of current
B. Chemical effect of current
C. Magnetic effect of current
D. Electromagnetic effect of current
5 The force experienced by an electron projected in a magnetic field B with a velocity V is given by
A. F=e(V x B)
B. F= -e(V x B)
C. F= e(B x V)
D. Both a and c
6 When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is
A. 90°
B. 75°
C. 0°
D. 180°
7 if the field is directed along the normal to the area, then flux is:
A.

Maximum

B.

Equal to zero

C.

Equal to BA

D.

Minimum
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 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
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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