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 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 # 2

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

Question # 3

A magnetic force on an electron travelling with 108ms-1parallel to a field of strength 1 Wb m-2is

Question # 4

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

Question # 5

In order to make a voltmeter, high resistance is connected with galvanometer, in

Question # 6

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

Question # 7

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

Question # 8

A resistance used in galvanometer to make it voltmeter is called

Question # 9

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

Question # 10

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

Question # 11

The force acting on a charge moving in a magnetic field

Question # 12

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 # 13

Weber is a unit of

Question # 14

The direction of lines of force depends upon the direction of

Question # 15

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

Question # 16

Galvanometer is a device used for the detection of

Question # 17

F = I(L x B) is a

Question # 18

Avo-meter is used of measure the

Question # 19

Electron gun consist of

Question # 20

The current sensitivity of the galvanometer is

Question # 21

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

Question # 22

Total number of turns on 0.15 m length solenoid is 300. the value of n is:

Question # 23

Centripetal force for electron is given by

Question # 24

The SI unit of magnetic permeability is

Question # 25

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

Question # 26

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

Question # 27

The unit of flux density is also given by

Question # 28

The SI unit of magnetic induction is

Question # 29

Flurescent screen is a screen where visible spot

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 The SI unit of flux density is
A. Newton/Amp-meter
B. Newton-m/Ampere
C. Newton-m/Amp2
D. Newton-Amp/meter
2 In a moving coil galvanometer, the deflecting couple depends upon
A. area of the coil
B. number of turns of coil
C. value of magnetic field
D. all of the above
3 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these
4 The total number of lines of magnetic induction pasing through a surface perpendicular to the magnetic field is called
A. magnetic flux
B. magnetic flux density
C. magnetic induction
D. magnetic field intensity
5 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
6 A voltmeter is used to measure the
A. potential difference
B. current
C. temperature
D. resistance
7 '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
8 The SI unit of flux density is.
A. Tesla
B. Weber
C. Gaun
D. Weber/meter
9 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
10 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

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