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Why are electric bulbs filled with chemi...

Why are electric bulbs filled with chemically inactive nitrogen or argon ?

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The bulbs are usually filled with chemically inactive nitrogen and argon gas so that filament does not burn out and the life of filament is prolonged.
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OSWAAL PUBLICATION-ELECTRICITY-TOPIC-2 ( Long Answer Type Questions )
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  2. Two wires of equal length, one of copper and the other of manganin hav...

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  3. Derive an expression for the equivalent resistance of three resistors ...

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  4. Fuse of 3A, 5A and 10A are available. Calculate and select the fuse fo...

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  5. What is meant by the statement that the resistance of a wire is 1 Omeg...

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  6. Two identical resistors each of resistance 12 Omega are connected (i) ...

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  7. How is a voltmeter connected in the circuit to measure the potential d...

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  8. Explain the term : Heating effect of electric current.

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  9. Derive an expression for the heat produced by electric current and sta...

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  10. Why are electric bulbs filled with chemically inactive nitrogen or arg...

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  11. State Ohm's law. Give mathematical relation between potentW difference...

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  12. When a 12 V battery is connected across an unknown resistor there is a...

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  13. Two wires X and Y are of equal length and have equal resistances. If t...

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  14. Study the following current time graphs from two different sources. ...

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  15. Calculate the resistance of the wire using the graph.

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  16. How many 176Omega resistors (in parallel) are required to carry 5A on ...

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  17. Define electric power. Derive relation between power, potential differ...

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  18. Draw a labelled circuit diagram to study the relationship between the ...

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  19. Find out the following in the electric circuit given in the figure. ...

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  20. Two conductors A and B of resistances 5 Omega and 10 Omega respectivel...

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