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The electric current flowing in a wire i...

The electric current flowing in a wire in the direction from B to A decreasing. Find out the direction of the induced current in the metalic loop kept above the wire as shown.

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The direction of magnetic field in the loop will be inwards due to current lowing in the wire AB. Hence, the direction of induced current will be in clockwise so as to oppose the decrease in the magnetic field,
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MODERN PUBLICATION-ELECTROMAGNETIC INDUCTION-REVISION EXERCISE (Very Short Answer Questions Carrying I mark)
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  4. What do you mean by magnetic flux through a surface?

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  5. A long straight current carrying wire passes normally through the c...

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  6. What is the relation between weber and Maxwell ?

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  7. Predict the direction of induced current in metal rings 1 and 2 when c...

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  8. Volt-sec is the unit of which physical quantity?

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  9. State Lenz's law of electromagnetic induction. The magnetic threading ...

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  10. When the north pole of a magnet is moved away from a coil, what is the...

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  11. Why a spark is produced in a switch sometimes when it is switched off?

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  12. Derive the expression for motional emf induced in a conductor moving i...

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  13. Define self-inductance of a coil. Obtain the expression for the energy...

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  14. What is the power required to move a conductor of length l having resi...

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  15. Can a moving bar magnet exert a force on a stationary charge? Explain.

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  16. Why eddy currents are named as eddy currents or focault currents?

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  17. What is meant by magnetic flux? A wire cuts across a flux of 0.2 xx 10...

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  18. A metallic plate is made to oscillate in the magnetic field. What will...

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  19. Why eddy currents are undesirable in the core of transformers?

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  20. Give one example of use of eddy currents.

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