1.

Magnetic field at the centre of a current carrying circular loop having 1 A current and number of turns one (radius of the loop is 1m ) will be *​

Answer»

Magnetic field due to circular LOOP is B 1 = 2rμ 0 I = 4πrμ 0 I 2πfield due to STRAIGHT wire isB 2 = 2πrμ 0 I = 4πrμ 0 I 2∵ net field =B 1 −B 2 = 4πrμ 0 I (2π−2) = 4πμ 0 × r2I (π−1)



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