A wire loop PQRSP is constructed by joining two semi circular coils of radii r_1and r_2 respectively as shown in the fig. current is flowing in the loop. The magnetic induction at point 'O' will be

A wire loop PQRSP is constructed by joining two semi circular coils of

1.	A wire loop PQRSP is constructed by joining two semi circular coils of radii r_1and r_2 respectively as shown in the fig. current is flowing in the loop. The magnetic induction at point 'O' will be
Answer» `(mu_0i)/(4)[ (1)/(r_1) - (1)/(r_2)]` `(mu_0 i)/(4) [(1)/(r_1) +(1)/(r_2)]` `(mu_0 i)/(2)[(1)/(r_1) -(1)/(r_2)]` `(mu_0 i)/(2) [(1)/(r_1) +(1)/(r_2)]` ANSWER :A

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A wire loop PQRSP is constructed by joining two semi circular coils of radii r_1and r_2 respectively as shown in the fig. current is flowing in the loop. The magnetic induction at point 'O' will be

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