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Which uses more energy: a 250 WTV set in...

Which uses more energy: a 250 WTV set in 1 hour or a 1200 W toaster in 10 minutes?

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The correct Answer is:
TVset uses `0.25 kWh` energy whereas toaster uses `0.20 kWh` energy. So, TV uses more energy.
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LAKHMIR SINGH & MANJIT KAUR-ELECTRICITY -Exercise
  1. For a heater rated at 4kW and 220V, calculate: (a) the current, (b...

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  2. An electric motor takes 5 amperes current from a 220 volt supply line....

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  3. Which uses more energy: a 250 WTV set in 1 hour or a 1200 W toaster in...

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  4. Compare the power used in the 2 Omega resistor in each of the followin...

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  5. Two lamps, one rated 40W at 220V and the other 60W at 220 V, are conne...

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  6. An electric kettle connected to the 230V mains supply draws a current ...

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  7. A 2 kW heater, a 200 WTV and three 100W lamps are all switched on from...

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  8. What is the maximum power in kilowatts of the appliance that can be co...

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  9. An electric fan runs from the 230V mains. The current flowing through ...

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  10. (a) What is meant by "electric power"? Write the formula for electric ...

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  11. When an electric lamp is connected to 12V battery, it draws a current ...

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  12. The unit for expressing electric power is:

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  13. Which of the following is likely to be the correct wattage for an elec...

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  14. An electric heater is rated at 2 kW. Electrical energy costs Rs 4 per ...

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  15. Unit of energy is SI system is

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  16. Commercial Unit Of Energy

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  17. How much energy does a 100W electric bulb transfer in 1 minute?

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  18. An electric kettle for use on a 230V supply is rated at 300 W. for saf...

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  19. How many joules of electrical energy are transferred per second by a 6...

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  20. At a given time, a house is supplied with 100A at 220V. How many 75W, ...

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