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संबंधित प्रश्न
The unit for expressing electric power is:
(a) volt
(b) joule
(c) coulomb
(d) watt
Write an expression for the electrical power spent in flow of current through a conductor in terms of
(a) Resistance and potential difference, (b) current and resistance.
Distinguish between kilowatt and kilowatt-hour.
An electric bulb is rated ‘100 W, 250 V’. What information does this convey?
An electric bulb, when connected across a power supply of 220 V, consumes a power of 60 W. If the supply drops to 180 V, what will be the power consumed? If the supply is suddenly increased to 240 V, what will be the power consumed?
Define 1 kilowatt hour.
Why is a concave reflector placed behind the heating element in a room heater.
An electric bulb is marked 100 W, 230 V. What does this mean?
A bulb is connected to a battery of e.m.f. 6V and internal resistance 2Ω A steady current of 0.5A flows through the bulb. Calculate the resistance of the bulb.
What is the commercial unit of electrical energy? Represent it in terms of joules.
