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The current passing through an electric kettle has been doubled. The heat produced will become:

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Heat produced becomes four times
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. Two exactly similar electric lamps are arranged (i) in parallel, and (...

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

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

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  4. Name two effect produced by electric current.

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

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

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  7. Name two effect produced by electric current.

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

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

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

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

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

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

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

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

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

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

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  18. 100 J of heat are produced each second in a 4 Omega resistance. Find t...

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  19. (a) Derive the expression for the heat produced due to a current 'I' f...

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  20. The heat produced by passing an electric current through a fixed resis...

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