Question

When the N-pole moves away from the coil, what happens to the flux and galvanometer?

Options

• Flux increases; the galvanometer shows no deflection.

• Flux decreases; the galvanometer deflects in the opposite direction.

• Flux does not change; the galvanometer deflects.

• Flux increases; the galvanometer deflects in the same direction as for approach.

Answer 1

Moving the N-pole away decreases the magnetic flux through the coil. The induced current reverses relative to the approaching-magnet case, producing an opposite galvanometer deflection.