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ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction
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Total Questions30
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Time Allowed30
ECAT Pre General Science Physics Chapter 15 Electromagnetic Induction
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Question # 1
The phenomenon of generation of induced emf is called:
Question # 2
The current produced by moving a loop of wire across a magnetic field is called
Question # 3
Michael Faraday and Joseph Henry belong respectively to
Question # 4
Referring to above figure, current in the coil P grows from zero to its maximum value
Question # 5
An induced current can be produced by:
Question # 6
The induced current in the loop can be increased by:
Question # 7
A coil of constant area is placed in a constant magnetic field. An induced current is produced in the coil when:
Question # 8
A.C. can be measure with the help of
Question # 9
For inducting emf in a coil the basic requirement is that:
Question # 10
Lens's law deals with the
Question # 11
The induced current in a conductor depends upon
Question # 12
Self inducede e.m.f. is also called
Question # 13
When there is no relative motion between the magnet and coil, the galvanometer indicated
Question # 14
Referring to above figure, a changing current in coil P can be produced:
Question # 15
The SI unit of magnetic induction is
Question # 16
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 # 17
Lenz's law is the consequence of
Question # 18
The device in which induced emf is statically induced emf is:
Question # 19
The motional e.m.f depends upon the
Question # 20
In magnet-coil experiment, emf can be produced by:
Question # 21
Which of the following is most suitable as the core of transformer
Question # 22
Back emf is produced due to
Question # 23
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 # 24
Which of the following quantities remain constant in step up transformer?
Question # 25
An emf is set up in a conductor when it:
Question # 26
When a conductor moved with its length parallel to the lines of magnetic fled:
Question # 27
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 # 28
An induced current can be produced by
Question # 29
Transformer is used to
Question # 30
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:
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