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Why are the conductors of electric heati...

Why are the conductors of electric heating devices, such as bread-toaster and elecbic irons, made of an alloy rather than a pure metal ?

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As alloy has high melting point so it can be heated to a large amount till getting red hot without melting.
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  16. Why is the tungsten used almost exclusively for filament of electric l...

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  17. Why are the conductors of electric heating devices, such as bread-toas...

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  18. Why is the series arrangement not used for domestic circuits ?

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  19. How does the resistance of a wire vary with its, area of cross-section...

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  20. Why are copper and aluminium wires usually employed for electricity tr...

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