the diagram shows a stationery box sitting on the floor which statement about the other force is exerted on the box are true

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

What happens when you slowly pulled the carboard?

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?