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 vector representation of force experience give the direction of

Question # 2

CRO deflects the beam of

Question # 3

The torque per unit twist of coil is called

Question # 4

Magnetic lines of force:

Question # 5

The SI unit of magnetic induction is

Question # 6

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

Question # 7

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

Question # 8

Tesla is the unit of

Question # 9

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

Question # 10

The magnetic field in the middle of a solenoid due to current is

Question # 11

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

Question # 12

Magnetic flux and flux density are related by

Question # 13

Electron gun consist of

Question # 14

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

Question # 15

Flurescent screen is a screen where visible spot

Question # 16

To convert galvanometer into ammeter we connect

Question # 17

magnetic field is a:

Question # 18

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

Question # 19

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

Question # 20

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

Question # 21

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

Question # 22

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

Question # 23

The CRO is used for displaying the waveform of a given

Question # 24

NmA-1 is commonly called:

Question # 25

A field is uniform and much stronger:

Question # 26

The most suitable material for permanent magnet is

Question # 27

Ammeter is used to measure

Question # 28

Centripetal force for electron is given by

Question # 29

How many number of anodes used in electron gun

Question # 30

Avo-meter is used of measure the

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Flurescent screen is a screen where visible spot
A. vanishes
B. is made
C. becomes small and large
D. none of these
2 A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is
A. Zero
B. 105 m
C. 10-10N
D. 108N
3 The CRO is used for displaying the waveform of a given
A. current
B. voltage
C. both of them
D. none of them
4 The straight current carrying conductor experiences maximum force in a uniform magnetic field when it is placed
A. parallel to the field
B. Perpendicular to the field
C. At an angle of 45 to the field
D. None of the above
5 'K' is the proportionality constant of force experienced by conductor. What is the value of 'K' in SI units?
A. 0
B. 1
C. 0.5
D. -1
6 Magnetic flux and flux density are related by
A. Flux density = flux x area
B. Flux density = flux / area
C. Flux density = flux - area
D. None of these
7 The magnetic force exerted on an electron moving with velocity 'v' at right angle to the magnetic field is given by
A. F=eVB
B. F=e2V/B
C. F=e/VB
D. F=B2/ev
8 When some compass needles are placed on a card board along a circle with the center at the wire, they will
A.

Point the direction of N-S

B.

Set themselves tangential to the circle

C.

Point in the direction of E-W

D.

None of these
9 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
10 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

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