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A boy noted the readings on his home's e...

A boy noted the readings on his home's electricity meter on Sunday at 8AM and again on Monday at 8 AM

(a) What was the meter reading on Sunday?
(b) What was the meter reading on Monday?
(c) How many units of electricity have been used?
(d) In how much time these units have been used?
(e) If the rate is Rs 5 per unit, what is the cost of electricity used during this time?

Text Solution

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The correct Answer is:
(a) 42919 (b) 42935 (c) 16 units (d) 24 hours (e) Rs. 80
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. State whether an electric heater will consume more electrical energy o...

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  2. The table below shows the current in three different electrical applia...

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  3. A boy noted the readings on his home's electricity meter on Sunday at ...

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

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

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

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

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  8. Name two effect produced by electric current.

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

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

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  11. Name two effect produced by electric current.

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

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

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

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

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

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

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

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

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

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