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Eddy currents are produced in a matteria...

Eddy currents are produced in a matterial when it is

A

A metal is kept in varying magnetic field

B

A metal is kept in the steady magnetic field

C

A circular coil is placed in a magnetic field

D

Through a circular coil, current is passed

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The correct Answer is:
A
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How eddy currents can be produced?

Assertion : A metallic surface is moved in and out in magnetic field then emf is induced in it. Reason : Eddy current will be produced in a metallic surface moving in and out of magnetic field.

Assertion : If a varying current is flowing through a machine of iron, eddy currents are produced. Reason : change in the magnetic flux thro' an area causes eddy currents.

ERRORLESS -ELECTRO MAGNETIC INDUCTION-SET
  1. Eddy currents are produced in a matterial when it is

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  2. The figure shows four wire loops, with edge length of either L or 2L. ...

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  3. A circular coil and a bar magnet placed nearby are made to move in the...

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  4. A square coil ABCD lying in x-y plane with its centre at origin. A lon...

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  5. A short magnet is allowed to fall from rest along the axis of a horizo...

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  6. The horizontal component of the earth's magnetic field at a place is 3...

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  7. A copper disc of radius 0.1 m rotates about its centre with 10 revolut...

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  8. A coil of Cu wire (radius r, self-inductance L) is bent in two concen...

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  9. In which of the following circuits is the current maximum just after t...

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  10. A small coil is introduced between the poles of an electromagnet so th...

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  11. Two circular coils A and B are facing each other as shown in figure. T...

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  12. A conductuing loop having a capacitor is moving outward from the magne...

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  13. A straight wire of length L is bent into a semicircle. It is moved in ...

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  14. If in a coil rate of change of area is (5meter^(2))/(milli second)and ...

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  15. In series with 20 ohm resitor a 5 henry inductor is placed. To the com...

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  16. Two circular coils P & Q are coaxially & carry currents I1 and I2 resp...

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  17. The phase difference between the flux linkage and the induced e.m.f. i...

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  18. A pair of parallel conducting rails lie at right angle to a uniform ma...

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  19. The magnetic field in the cylindrical region shown in figure increase ...

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  20. An aircraft with a wingspan of 40 m flies a speed of 1080 km hr(1) in ...

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  21. A hundred turns of insulated copper wire are wrapped around an iron cy...

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