The magnetic induction at centre O Fig.

The magnetic induction at centre O in the following figure will be

The magnetic induction at centre O in the following figure will be

The magnetic induction at the centre O in the figure shown in

In the figure shown there are two semicircles of radii r_(1) and r_(2) in which a current i is flowing. The magnetic induction at the centre O will be

In the figure shown there are two semicircles of radii r_(1) and r_(2) in which a current i is flowing. The magnetic induction at the centre O will be

In the figure shown there are two semicircles of radii r_(1) and r_(2) in which a current i is flowing. The magnetic induction at the centre O will be

The magnetic inductionn at the centre O in the figure shown is