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Why is an electric light bulb not filled with air ? Explain why argon or nitrogen is filled in an electric bulb. b. Explain why

Why is an electric light bulb not filled with air ? Explain why argon or nitrogen is filled in an electric bulb.

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

c. Explain why, the current that makes the heater element very hot, only slightly warms the connecting wires leading to the heater.

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