Question

Suppose a room has a magnetic field directed downwards. In order to experience the maximum magnetic force, the current carrying wire must be kept horizontal.

• A. True
• B. False

Answer 1

The correct option is A

True

The magnetic force on a current-carrying wire depends on the magnitude of current and the strength of magnetic field. The force is maximum when the direction of current and the field are perpendicular to each other.

Here, the direction of magnetic field is acting downwards, the current carrying wire must be kept horizontal for it to be perpendicular to the magnetic field. Also, this force is minimum (i.e. zero), if the current carrying wire and the field are along the same direction or parallel.