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 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

Question # 2

Current is measured in

Question # 3

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 # 4

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

Question # 5

CRO deflects the beam of

Question # 6

Resistance is measured in

Question # 7

NmA-1 is commonly called:

Question # 8

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

Question # 9

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

Question # 10

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

Question # 11

A voltmeter is used to measure the

Question # 12

Amperean path is a:

Question # 13

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 # 14

Magnetic flux and flux density are related by

Question # 15

The SI unit of flux density is

Question # 16

A field is uniform and much stronger:

Question # 17

Weber is a unit of

Question # 18

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

Question # 19

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 # 20

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

Question # 21

Strength of magnetic field is measured in SI units, in:

Question # 22

The unit of magnetic flux is

Question # 23

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

Question # 24

To convert galvanometer into ammeter we connect

Question # 25

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

Question # 26

The strength of magnetic field around the current conductor is

Question # 27

The unit of flux density is also given by

Question # 28

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

Question # 29

Electron gun consist of

Question # 30

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

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 NmA-1 is commonly called:
A. Weber
B. Apmere
C. Guass
D. Coulomb
2 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
3 The SI unit of magnetic induction is
A. Gauses
B. Tesla
C. Weber
D. Weber2
4 The force exerted on a conductor of length L, carrying current I when placed in a magnetic field B is given by
A. F=IB/L
B. F= L x B/I
C. F = IL x B
D. F = IL . B
5 When the charged particle is projected at right angles to the field, then experienced by it will be:
A. Maximum
B. Zero
C. qvB
D. Both (A) and (B)
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 A resistance used in galvanometer to make it voltmeter is called
A. shunt resistance
B. high resistance
C. zero resistance
D. none of these
8 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
9 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
10 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

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