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 SI unit of magnetic induction is

Question # 2

A resistance used in galvanometer to make it voltmeter is called

Question # 3

For the conversion of galvanometer into voltmeter, we connect a

Question # 4

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 # 5

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

Question # 6

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

Question # 7

NmA-1 is commonly called:

Question # 8

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 # 9

Resistance is measured in

Question # 10

When the charged particle is projected at right angles to the field, then experienced by it will be:

Question # 11

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

Question # 12

Amperean path is a:

Question # 13

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 # 14

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

Question # 15

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 # 16

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

Question # 17

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

Question # 18

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

Question # 19

The torque per unit twist of coil is called

Question # 20

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

Question # 21

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

Question # 22

A galvanometer is an instrument used to

Question # 23

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

Question # 24

The SI unit of flux density 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

The angle of deflection of coil can be measured by the

Question # 27

When a suitable small resistance is put in parallel with the galvanometer coil, it is converted into

Question # 28

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

Question # 29

The current is measured in

Question # 30

The permeability of free space is measured in:

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ECAT Physics Chapter 14 Important MCQ's

Sr.# Question Answer
1 Ammeter is used to measure
A. voltage
B. resistance
C. voltage and current
D. current
2 A long wire wound tightly on a cylindrical core is called:
A. Potentiometer
B. Solenoid
C. Toroid
D. Wheat and stone bridge
3 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
4 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
5 Method "lamp and scale arrangement" used to measure the
A. angle of deflection
B. restoring torque
C. magnetic field strength
D. current
6 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
7 Which is modified form of galvanometer
A. potentiometer
B. battery
C. voltmeter
D. slide wire bridge
8 The e/m of an electron moving in a circular path in a magnetic field is equal to
A. V/Br
B. V/B2r2
C. V2/Br2
D. V2/Br
9 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
10 Galvanometer is a device used for the detection of
A. voltage
B. current
C. temperature
D. pressure

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