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प्रश्न
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उत्तर
Watt-hour is the commercial unit of electrical energy.
One watt-hour is the electrical energy consumed by an electrical appliance of power 1 watt when it is used for 1 hour.
1Wh = 3600 J
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संबंधित प्रश्न
What actually travels through the wires when you switch on a light?
Which of the two is connected in series : ammeter or voltmeter?
Draw a circuit diagram to show how two 4 V electric lamps can be lit brightly from two 2 V cells.
Draw a schematic diagram of an electric circuit consisting of a battery of two cells each of 1.5 V, 5 Ω, 10 Ω and 15 Ω resistors and a plug key, all connected in series.
Define the following:
Electromotive force
A current of 0.2 A flows through a wire whose ends are at a potential difference of 15 V. Calculate:
(i) The resistance of the wire, and
(ii) The heat energy produced in 1 minute.
Problems for practice:
If 3A current flows through a circuit, then convert the current in terms of a milliampere.
1020 electrons, each having a charge of 1.6 x 10-19 C, flows in a circuit V is 0.1s. What is the current in ampere?
