An engineer in a workshop is holding a grounded metal support beam with one hand. With his other hand, he holds a mains-operated angle grinder with a metal body. The power cable of the angle grinder is severely damaged, allowing the live wire to make direct contact with its metal casing. What danger does this present to the engineer?
An electric current could flow through the engineer from one hand to the other and electrocute him.
The electric current flowing through the support beam could heat it up and cause severe burns to his hand.
A large electric current could blow the fuse and permanently damage the grinder's motor.
The large current could cause the grinder's motor to spin at a dangerously high speed.
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.