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

Centripetal force for electron is given by

Question # 2

The torque per unit twist of coil is called

Question # 3

CRO deflects the beam of

Question # 4

Gauss(G) is smaller unit of magnetic induction which is related to tesla(T) as

Question # 5

The SI unit of flux density is.

Question # 6

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

Question # 7

Tesla is the unit of

Question # 8

The field around a moving charge is called

Question # 9

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

Question # 10

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

Question # 11

A voltmeter is used to measure the

Question # 12

The angle of deflection of coil can be measured by the

Question # 13

The SI unit of magnetic flux is.

Question # 14

Current is measured in

Question # 15

The sources of magnetic field are

Question # 16

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

Question # 17

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

Question # 18

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 # 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

A galvanometer is an instrument used to

Question # 21

A galvanometer in which the coil comes to rest quickly after the current passed through it, or the current stopped form flowing through it, is called

Question # 22

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

Question # 23

To convert galvanometer into ammeter we connect

Question # 24

A solenoid is a coil of wire which is:

Question # 25

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

Question # 26

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

Question # 27

Magnetic lines of force:

Question # 28

A resistance used in galvanometer to make it voltmeter is called

Question # 29

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

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 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°
2 Resistance is measured in
A. volts
B. ampere
C. ohm
D. watt
3 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
4 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
A. ammeter
B. voltmeter
C. galvanometer
D. avo-meter
5 Magnetic flux passing through a element whose vector area makes an angle0º with lines of magnetic force is:
A. BACosѲ

B. Zero
C. BA
D. BA sinѲ
6 In a straight current carrying conductor, the direction of magnetic field can be found by
A. right hand rule
B. left hand rule
C. head to tall rule
D. none of these
7 Electron gun consist of
A. three anodes
B. heating cathode
C. three anodes
D. three anodes , heating cathode, grid
8 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
9 Weber is a unit of
A. magnetic flux
B. magnetic filed intensity
C. magnetic induction
D. magnetic flux density
10 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

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