Why are copper and aluminium wires usually employed for electricity transmission? [1 MARK]
Reason: 1 Mark Copper and Aluminum wires possess low resistivity and as such are generally used for electricity transmission.
Why are copper and aluminium wires usually employed for electricity transmission?
Why are copper and aluminium wires usually used for electricity transimission?
Explain the following.
(a) Why is the tungsten used almost exclusively for filament of electric lamps?
(b) Why are the conductors of electric heating devices, such as bread-toasters and electric irons, made of an alloy rather than a pure metal?
(c) Why is the series arrangement not used for domestic circuits?
(d) How does the resistance of a wire vary with its area of cross-section?
(e) Why are copper and aluminium wires usually employed for electricity transmission?