Question

Explain the following:

(a) Why is the tungsten used almost exclusively for the 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 ?
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It's very urgent

Answer 1

Answer:

c. because in parallel arrangement if one device stops working other kees working this doesn't apply in series

d. inversely

e. they're good conductor and have high tensile strength

Answer 2

Answer:

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