Question

Two very long parallel wires are a distance d apart and carry equal currents in opposite directions. the locations where the net magnetic field due to these currentsis equal to zero?

what is the right answer?

Answer 1

Magnetic field due to first wire 2πα Here, /, is the current, d is the distance of separatior Similarly magnetic filed due to second wire 2rd Calculate the magnetic field at any point between two wire (μο, Hence, there is no any point between the wire where the net magnetic field is zero.

Answer 2

As the current are flowing in same direction, the magentic field produced at centre or mid point due to each wire is B=X0J/ pi d

The direction of these field will be equal and opposite to each other at mid-point,
so net electric field will be zero at mid-point