A straight horizontal conducting rod of length $0.45\;m$ and mass $60\;g$ is suspended by two vertical wires at its ends. A current of $5.0\;A$ is setup in the rod through the wires . What magnetic field should be setup normal to the conductor in order that the tension in the wires is zero?

Question

$\begin{array}{1 1} 0.26\;T \\ 0.23\;T \\ 0 \\ 20 \end{array}$