How does the magnetic field strength at the center of a circular loop change if the current through the loop is doubled?

Question

How does the magnetic field strength at the center of a circular loop change if the current through the loop is doubled? — Exam MCQ

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A. It becomes twice as large — The magnetic field at the centre of a current-carrying circular coil is directly proportional to the current. Therefore, when the current is doubled, the magnetic field also becomes twice as large.

rrbjepyq.in · Answer

B. It becomes four times as large

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C. It becomes half as large

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D. It remains unchanged

How does the magnetic field strength at the center of a circular loop change if the current through the loop is doubled?

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