A power circuit uses a cable having three different wires.
(a) Name the three wires of the cable.
(b) Between which of the two wires should the heating element of an electric geyser be connected?
(c) To which wire should the metallic case of the geyser be connected?
(d) To which wire should the switch and fuse be connected?
(a) Of what substance is the fuse wire made ? Why ?
(b) Explain why, a copper wire cannot be used as a fuse wire.
Why do we use a short wire in fuse and not long wire if we know that more is the length more is the heat produced