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Choose the correct option: A rectangul...

Choose the correct option:
A rectangular coil of copper wires is rotated in a magnetic field. The direction of the induced current changes once in each:

A

two revolutions

B

one revolution

C

half revolution

D

one-fourth revolution

Text Solution

Verified by Experts

The correct Answer is:
A
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LAKHMIR SINGH & MANJIT KAUR-MAGNETIC EFFECT OF ELECTRIC CURRENT -Exercise
  1. Name some sources of direct current.

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  2. Which sources produce alternating current?

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  3. Choose the correct option: A rectangular coil of copper wires is rot...

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  4. Name two safety measures commonly used in electric circuits and applia...

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  5. An electric oven of a 2kW power rating is operated in a domestic circu...

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  6. What precaution should be taken to avoid the overloading of domestic e...

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  7. Which of the following correctly describes the magnetic field near a l...

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  8. The device used for producing electric current is called a:

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  9. The essential difference between an AC generator and a DC generator is...

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  10. At the time of short-circuit, the current in the circuit:

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  11. State whether the following statements are true or false. (a) An ele...

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  12. List three sources of magnetic fields.

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  13. How does a solenoid behave like a magnet? Can you determine the north ...

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  14. When is the force experienced by a current-carrying conductor placed i...

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  15. Imagine you are sitting in a chamber with your back to one wall. An el...

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  16. Draw a labelled diagram of an electric motor. Explain its principle an...

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  17. Name some devices in which electric motors are used.

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  18. A coil of insulated copper wire is connected to galvanometer. What wou...

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  19. Two circular coils A and B are placed close to each other. If the curr...

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  20. State the rule to determine the direction of a (i) magnetic field p...

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