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Two exactly similar electric lamps are a...

Two exactly similar electric lamps are arranged (i) in parallel, and (ii) in series. If the parallel and series combination of lamps are connected to 220V supply line on by one, what will be the ratio of electric power consumed by them?

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The correct Answer is:
`4:1`
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. A boy noted the readings on his home's electricity meter on Sunday at ...

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  2. Several electric bulbs designed to be used on a 220 V electric supply ...

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  3. Two exactly similar electric lamps are arranged (i) in parallel, and (...

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  4. How does the heat H produced by a current passing through a fixed resi...

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  5. The current passing through an electric kettle has been doubled. The h...

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  6. Name two effect produced by electric current.

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  7. Which effect of current is utilised in an electric light bulb?

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  8. Which effect of electric current is used in the working of an electric...

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  9. Name two effect produced by electric current.

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

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  11. Why does the cord of an electric heater not glow while the heating ele...

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  12. (a) Write down the formula for the heat produced when a current I is p...

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  13. Why is an electric light bulb not filled with air? Explain why argon o...

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

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  15. Explain why, the current that makes the heater element very hot, only ...

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  16. When a current of 4.0A passes through a certain resistor for 10 minute...

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  17. A heating coil has a resistance of 200 Omega. At what rate will heat b...

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  18. An electric heater of resistance 8 Omega draws 15 A from the service m...

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  19. A resistance of 25 Omega is connected to a 12V battery. Calculate the ...

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  20. 100 J of heat are produced each second in a 4 Omega resistance. Find t...

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