Question

Magnetic field at a point p due to given current distribution

Answer 1

Oersted had found that magnetic field is created around the current carrying conductor.

Magnetic field prevails as long as there is current in the wire. The direction of magnetic field was found to be modified when the direction of the current was found to be reversed.

Biot-Savart’s law is employed to find out the magnetic field at any point due to the current carrying conductors.

Answer 2

Magnetic field at point P due to given current distribution is (mew not)ia/πr^2.

Let i be current in each wire and B be the magnetic field at  point p.

Due to current, magnetic field at p is 0.

        B=U0/4π. i/r(sinФ1+sinФ2)

        where r is distance r=√2a.

        B=U0/2πr.2sin45⁰

        B=U0ia/πr^2.

The direction of magnetic field  was found to be modified when the direction of current was found to be reversed.

Biot-Savart's law was employed to find out the magnetic field at point p due to given current distribution