For adjoining fig, The magnetic field at point, 'P' will be:

Options

A. `(mu_(0))/(4 pi) odot`
B. `(mu_(0))/(pi) otimes`
C. `(mu_(0))/(2 pi) otimes`
D. `(mu_(0))/(2 pi) odot`

Answer

C

Explanation

Magnetic field due to `5A to (5 mu_(0))/(2 pi xx 2.5) = (2 mu_(0))/(2 pi) otimes`
Magnetic field due to `2.5 A to (2.5 mu_(0))/(2 pi xx 2.5) = (mu_(0))/(2 pi) odot`
Resultant Magnetic field = `(2 mu_(0))/(2 pi) - (mu_(0))/(2 pi) = (mu_(0))/(2pi) otimes`