Give the symbol of an electric fuse used in circuit diagrams.

What name is given to the device which automatically cuts off the electricity supply during short-circuiting in household wiring?

What is the usual capacity of an electric fuse used (i) in the lighting circuit, and (ii) in the power circuit, of a small house?

State whether the following statements are true or false:

(a) A wire with a green insulation is usually the live wire.

(b) A miniature circuit breaker (MCB) works on the heating effect of current.

Along with live wire and neutral wire, a third wire is also used in domestic electric wiring. What name is given to this third wire?