Physics

Problem

Two coaxial solenoids are wound one over the other, each having 1000 turns uniformly distributed over a length of

0.25\,\text{m}

. The first carries

5\,\text{A}

clockwise current and the second carries

3\,\text{A}

anticlockwise current. The magnitude of the resultant magnetic field inside the pair is a)

2.0\times10^{-2}\,\text{T}

1.0\times10^{-2}\,\text{T}

4.0\times10^{-2}\,\text{T}

0\,\text{T}