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MHT CET Physics question

PhysicsMoving Charges and MagnetismMHT CET

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 [NCERT 1980, AIIMS 1980, MP PMT 1995, MP PMT 1999]

Answer: (C)

Solution

One turn: , ; two turns: ,

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Question ID VK-078686