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. If the same current I is passed, the ratio of the magnitude of magnetic field at the centre with its first value is:A. A quarter of its first valueB. UnalteredC. Four times of its first valueD. A half of its first value

A length of wire carries a steady current I. It is bent first to form

1.	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. If the same current I is passed, the ratio of the magnitude of magnetic field at the centre with its first value is:A. A quarter of its first valueB. UnalteredC. Four times of its first valueD. A half of its first value
Answer» Correct Answer - C

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