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Question
The diagram in shows a coil of several turns of copper wire near a magnet NS. The coil is moved in the direction of arrow shown in the diagram.
- In what direction does the induced current flow in the coil?
- Name the law used to arrive at the conclusion in part (i).
- How would the current in coil be altered if
- the coil has twice the number of turns,
- the coil was made to move three times fast?
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Solution
- When the coil is moved in the direction of magnet the North pole generates near this end and current starts flowing from A to B.
- Lenz's law.
-
- Current is directly proportional to the number of turns, therefore it will also become 2 times.
- Current becomes thrice.
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