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Sahay Sir > Question Answers > Cengage NEET by C.P Singh > Part 2 > Chapter 5 - Magnetic Field > A length of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give double loop of smaller radius. The magnitude field at the centre caused by the same current is

A length of wire carries a steady current I. It is bent first to form a circular plane coil of one turn. The same length is now bent more sharply to give double loop of smaller radius. The magnitude field at the centre caused by the same current is

The magnetic field at O is