The elements of electrical heating devices are usually made of:
(a) tungsten (b) bronze (c) nichrome (d) argon

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Solution

(c) nichrome

This is because the metal gets heated up faster due to the reason that band separation energy of alloys is greater than pure metal. Alloys get heated up at larger temperature than the pure metals. So alloys like nichrome are used as the elements of electrical heating devices.

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Similar questions

The materials of electric heating devices are usually made of:

(A) Argon

(B) Bronze

(D) Tungsten

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?

(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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