Question

1 What happens to the direction of the force on a current-carrying wire if the

direction of the current and the magnetic field are both reversed?

Answer 1

If the forefinger points in the direction of the magnetic field and the middle finger in the direction of the current, then, the thumb points in the direction of the force exerted on the conductor.So, if the current is reversed in the conductor placed in a magnetic field the direction of force is also reversed..