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Explain why, filament type electric bulb...

Explain why, filament type electric bulbs are not power efficient.

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In filament type electric bulb, we get light when the filament heats up and begins to glow. A large amount of electrical energy is lost as heat. So, this kind of bulb is energy efficient or power efficient.
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ZEN PUBLICATION-ELECTRICITY-ZEN ADDITIONAL QUESTIONS SECTION (VERY SHORT ANSWER TYPE QUESTIONS)
  1. Two resistances x and y are connected i] in parallel and, ii] in s...

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  2. What is the SI unit of [i] electric energy, and [ii] electric power?

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  3. Explain why, filament type electric bulbs are not power efficient.

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  4. Resistance of an incandescent filament of a bulb is comparatively much...

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  5. What happens to the other bulbs in series circuit, if one bulb blows o...

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  6. Calculate the number of electrons constituting one coulomb of charge.

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  7. State the relationship between 1 ampere and 1 coulomb.

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  8. State the relationship between 1 volt and 1 joule.

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  9. Would electrons move from higher potentials to lower potentials or vic...

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  10. Why is a voltmeter connected in parallel across a circuit element?

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  11. What is the SI unit of potential difference ? Name the device used to ...

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  12. What is meant by saying that the electric potential at a point is Ivol...

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  13. How much work is done when one coulomb charge moves against a potentia...

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  14. What is the SI unit of electric current?

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  15. Compare how an ammeter and a voltmeter are connected in a circuit.

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  16. What is the current in a circuit if the charge passing through each po...

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  17. Name the unit of electrical resistance and give its symbol.

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  18. A resistance of 20 ohms has a current of 2 amperes flowing in it. What...

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  19. A current of 5 amperes flows through a wire whose ends are at a potent...

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  20. Give the law of combination of resistances in series.

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