Rankers Physics
Topic: Magnetic Effects of Current
Subtopic: Magnetic Field Due to Circular Current Carrying Wire

A length of wire carries a steady current. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give a double loop of smaller radius. The magnetic field at the centre caused by the same current is :
a quarter of its first value
unaltered
four times of its first value
half of its first value

No solution provided for this question.

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