Explain the following.
(a) Why is the tungsten used almost exclusiv... VIDEO
Explain the following.
(a) Why is the tungsten used almost exclusively for fllament 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 serles 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?
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