ECAT Physics Chapter 15 Electromagnetic Induction Online Test

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  • Chapter NameCh 15 - Electromagnetic Induction
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ECAT Physics Chapter 15 Electromagnetic Induction Online Test

  • Total Questions15

  • Time Allowed20

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ECAT Physics Chapter 15 Electromagnetic Induction Online Test

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Question # 1

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 # 2

Which of the following is most suitable as the core of transformer

Question # 3

The direction of induced current is always so as to oppose the cause which produces it. This is

Question # 4

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

Question # 5

The induced current in a conductor depends upon

Question # 6

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

Question # 7

Referring to above figure, current in the coil P grows from zero to its maximum value

Question # 8

Motional emf is called motional:

Question # 9

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

Question # 10

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

Question # 11

An induced current can be produced by:

Question # 12

Referring to above figure, current in coil P falls from its maximum value to zero:

Question # 13

The induced emf in a coil is proportional to:

Question # 14

The current produced by moving a loop of wire across a magnetic field is called

Question # 15

Back emf is produced due to

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