ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

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  • Chapter NameCh 15 - Electromagnetic Induction

ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

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ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction

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Question # 1

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

Question # 2

In magnet-coil experiment, emf can be produced by

Question # 3

Step up transformer has a transformation ratio of 3:2. What is the voltage in secondary, if voltage in primary is 30V:

Question # 4

The induced current in the loop can be Increased by

Question # 5

Lenz's law is the consequence of

Question # 6

In the equilibrium state, the potential difference between two ends of the conductor moving across a magnetic field is called:

Question # 7

A coil of constant area is placed in a constant magnetic field. An include current is produced in the coil when:

Question # 8

In a coil current change from 2 to 4 A in .05 s. If the average induced emf is 8V then coefficient of self-inductance is:

Question # 9

A device which converts Electrical energy into mechanical energy is called as

Question # 10

An induced current can be produced by

Question # 11

The magnitude of induced emf depends upon the:

Question # 12

The induced emf in a coil is proportional to:

Question # 13

Michael Faraday and Joseph Henry belong respectively to

Question # 14

The device in which induced emf is statically induced emf is:

Question # 15

A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:

Question # 16

What is the coefficient of mutual inductance, when the magnetic flux changes by 2 X 10-2Wb, and change in current is 0.01 A?

Question # 17

The change of magnetic flux through a circuit will produce

Question # 18

Referring to above figure, due to change in current in the coil P, the change in magnetic flux:

Question # 19

A metal road of length 1m is moving at a speed of 1 ms-1In a direction making angle of 30º with 0.5 Y magnetic field. The emf produced in the rod is:

Question # 20

Self inducede e.m.f. is also called

Question # 21

Instead of moving the coil towards a magnet, the magnet is moved towards the coil with the same speed. The galvanometer shows current:

Question # 22

Which of the following quantities remain constant in step up transformer?

Question # 23

When there is no relative motion between the magnet and coil, the galvanometer indicates:

Question # 24

Lens's law deals with the

Question # 25

Split rings act as

Question # 26

The ratio of average e.m.f in the coil tot he time rate of change of current in the same coil is called

Question # 27

When a conductor is moved across a magnetic field, the redistribution of charge sets up:

Question # 28

Plan of a coil makes an angle of 20º with the lines of magnetic field. The angle between B and vector area of plane of coil is:

Question # 29

The law of electromagnetic induction is related to:

Question # 30

When the conductor moved across a magnetic field:

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