Q32 of 330 Page 59

Which of the following is likely to be the correct wattage for an electric iron used in our homes?

The correct wattage for an electric iron used in our homes is 850 W.

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When an electric lamp is connected to 12 V battery, it draws a current of 0.5 A. The power of the lamp is :

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The unit for expressing electric power is:

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An electric heater is rated at 2kW. Electrical energy costs ₹ 4 per kWh. What is the cost of using the heater for 3 hours?

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The SI unit of energy is: