A uniform wire of resistance `12Omega` is bent in the form of a square. A cell of `emf6V` having negligible innternal resistance connected across the diagonal of the square. The magnetic induction at its centre `(` in tesla `)`.

Options

A. 0
B. `10^(-7)`
C. `5 xx 10^(-7) `
D. `(mu_0)/(4pi) xx 5 xx 10^(-2)`

Answer

A

Explanation

`B_1 = (mu_0i)/(4pi r) (sin theta_1 + sin theta_2) `