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Eddy currents do not produce...

Eddy currents do not produce

A

Sparking

B

Loss of energy

C

Damping

D

Heating

Text Solution

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

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.

Assertion: Eddy current is produced in any metallic conductor when magnetic flux is changed aroundn it. Reason: Electric potential determines the flow of charges

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.

MOTION-ELECTRO MAGNETIC INDUCTION-EXERCISE-2 (Objective problems (Analytical questions))
  1. A conducting rod rotates with a constant angular velocity 'omega' abou...

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  2. Two long parallel metallic wires with a resistance 'R' from a horizont...

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  3. A bar magnet is dropped between a current carrying coil. What would be...

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  4. A closed coil consists of 500 turns has area 4 cm^2 and a resistance o...

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  5. A coil of area 500cm^(2) and having 1000 turns is held perpendicular t...

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  6. A current time curve is shown in the following diagrame . This type of...

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  7. The armature coil of dynamo is in motion . The generated induced emf v...

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  8. A simple electric motor has an armature resistance of 1Omega and runs ...

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  9. A d.c motor has internal resistance 4 ohms . It is operated at 220 vol...

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  10. An electric motor runs on a d.c. source of emf epsilon and internal re...

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  11. Transformer is used to

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  12. Large transformers, when used for some time, become hot and are cooled...

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  13. For same rating which have the maximum efficiency from following :-

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  14. 2.2 किलोवाट शक्ति को 20 ओम वाली लाइन से 44000 वोल्ट पर संचारित किया जा...

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  15. If a transformer have turn tatio 5, frequency 50 Hz root mean square v...

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  16. plane of eddy currents make an angle with the plane of magnetic lines ...

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  17. Eddy currents do not produce

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  18. When a metallic sphere is moved in a magnetic field , it gets heated d...

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  19. Two copper cubes A and B composed of identical insulated plates are su...

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  20. A bar magnet is dropped into a vertical copper tube, considering the a...

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