Physics · Magnetic Effect of Electric Current
A single-turn coil of radius R produces a magnetic field B at its centre. If the same wire is wound into a coil of n turns (each of radius R/n) carrying the same current I, what will be the value of the new field at the centre?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1B/n
- 2B
- 3nB
- 4n2B✓
Correct answer
n2B
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