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

Current is measured in

Question # 2

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

Question # 3

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

Question # 4

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 # 5

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 # 6

A resistance used in voltmeter is called

Question # 7

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

Question # 8

The SI unit of magnetic permeability is

Question # 9

The force experienced by charged particle is maximum, if it moves

Question # 10

In a moving coil galvanometer, the deflecting couple depends upon

Question # 11

magnetic field is a:

Question # 12

The voltage increases linearly with

Question # 13

Resistance is measured in

Question # 14

The unit of magnetic flux is

Question # 15

Avo-meter is used of measure the

Question # 16

A long wire wound tightly on a cylindrical core is called:

Question # 17

A galvanometer is an instrument used to

Question # 18

When the waveform of one voltage is increasing and that of second is decreasing and vice versa, then phase difference between these voltage is

Question # 19

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:

Question # 20

Which one of the following relations is correct?

Question # 21

The CRO is used for displaying the waveform of a given

Question # 22

The SI unit of magnetic induction is

Question # 23

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

Question # 24

Lorentz force is defined as

Question # 25

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

Question # 26

For the conversion of galvanometer into voltmeter, we connect a

Question # 27

In the region surrounding a current carrying wire:

Question # 28

Magnetic lines of force:

Question # 29

To convert galvanometer into ammeter we connect

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 The unit of magnetic flux is
A. Weber-m2
B. Weber-m3
C. Henry
D. Weber
2 Charge to mass ratio (e/m) of an electron is given by the relation
A. e/m = 2V/Br2
B. e/m = 2V/B2r
C. e/m = 2V/B2r2
D. e/m = V/2B2r2
3 The magnetic field inside a solenoid can be increased by:
A. Increasing n
B. Decreasing I
C. Increasing I
D. By using iron core within solenoid
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 A shunt resistance parallel to the galvanometer is used to convert it into
A. avometer
B. millimeter
C. voltmeter
D. none of these
6 The magnetic field outside the solenoid due to current is
A. strong
B. zero
C. weak
D. uniform
7 In order to make a voltmeter, high resistance is connected with galvanometer, in
A. perpendicular
B. may be paralled or pendicular
C. series
D. none of these
8 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
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 The SI unit of magnetic permeability is
A. WB A-1m-1
B. WB mA-1
C. WB Am-1
D. None of these

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