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Heating Effect of Current

Explain why, ...

Question

Explain why, tungsten is used for making the filaments of electric bulbs.

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Solution

Tungsten is used to make filaments of electric bulb as they have high resistivity, high melting point and do not oxidise readily at high temperatures

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Q. Explain the following:
(a) Why is tungsten used almost exclusively for filament of electric lamps?
(b) Why are copper and aluminium wires usually used for electricity transmission?
(c)Why is nichrome alloy used for making elements of electric irons?

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