alleryA solenoid has n turns instead of a single loop, with the same current. Compared with a single loop, the magnetic field it produces is:
An times larger
BUnchanged
Cn² times larger
Dn times smaller
Answer & Solution
Correct answer: A. n times larger
1. Each loop contributes a magnetic field at the centre, all in the same direction.
2. The chapter states that if there are n turns, the magnetic field produced is n times that of a single loop.
3. The option n² is wrong because the contributions add linearly, not as a square.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 4 "Effects of Electric Current", p.62_
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