MCQ
The magnetic field produced by a current $-$ carrying wire at a given point depends on:
- ✓The current passing through it
- BThe voltage across it
- CThe power through it
- DAll
✓
Answer
Correct option: A.
The current passing through it
The magnetic field produced by a current $-$ carrying wire at a given point depends directly on the current passing through it.
Therefore, if there is a circular coil having n turns, the field produced is n times as large as that produced by a single turn.
This is because the current in each circular turn has the same direction, and the field due to each turn then just adds up.
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