The diagram shows a wire in the magnetic field between two poles of a magnet.
The current in the wire repeatedly changes between a constant value in one direction and a constant value in the opposite direction. This is shown on the graph.
What is the effect on the wire?
The force on the wire alternates between one direction and the opposite direction.
The force on the wire is constant in size and direction.
There is no force acting on the wire at any time.
There is only a force on the wire when the current reverses.
