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Calculate the power of a heating appliance having 230 ohm resistance when 2 A current passes through it.

Important Questions on Effects of Electric Current

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The commercial unit of electric energy is

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How much energy does a 100 W electric bulb transfer in 1 minute?
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An electric heater is rated at 2 kW. Electrical energy costs ₹4 per kWh. What is the cost of using the heater for 3 hours?
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1 kWh is equivalent to—
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An electric bulb is rated 220 V and 100 W. When it is operated on 110 V, the power consumed will be – 
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How many joules of electrical energy is transferred per second by a 6 V, 0.5 A lamp?
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If bulbs of different wattages are joined in parallel, then the bulb with the _____ wattage glows with maximum brightness.

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Amongst the units given below, which units are of electric power?

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The commercial unit of energy is:
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Which of the following is likely to be the correct wattage for an electric iron used in our homes?
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Among the following, electrical power is not determined by —
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Which of the following terms does not represent electrical power in a circuit? 
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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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Generally all electric appliances are rated with—

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The SI unit of energy is:
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An electric kettle for use on a 230 V supply is rated at 3000 W. For safe working, the cable connected to it should be able to carry at least:
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1 kWh=_____ ×106 J
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At a given time, a house is supplied with 100 A at 220 V. How many 75 W, 220 V light bulbs could be switched on in the house at the same time (if they are all connected in parallel)?
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Science>Physics>Effects of Electric Current>Electric Power
The unit for expressing electric power is:
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Two conducting wires of the same material and of equal lengths and equal diameters are first connected in series and then parallel in a circuit across the same potential difference. The ratio of heat produced in series and parallel combinations would be