Questions
A length of wire caries a steady current. First it is bent to form a circular coil of one tum. Then it is bent more sharply to form a loop of two turns but of smaller radius. Now the magnetic flux density at the centre caused by same current is found to be such that
detailed solution
Correct option is B
B =B1=μ0Ni2R L=N×2πR B2=μ02Ni2 R2 L=2N×2πR2 B2=4 B1Talk to our academic expert!
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