Why is there a greater risk of a severe electric shock if a person touches a live electrical wire with wet hands rather than dry hands?
Water increases the electrical resistance of the skin, causing the appliance's thermal fuse to blow.
Water conducts electricity and significantly lowers the electrical resistance of the contact, allowing a much larger current to flow through the body.
Wet hands cause the magnetic field around the wire to increase, resulting in a stronger electromagnetic force.
Water reacts with the copper in the wire to increase the electric potential difference of the power supply.
135 exam-style questions on CIE IGCSE Physics Electrical safety, covering Electrical safety. Each one has a worked solution and a mark scheme showing where the marks go.