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The unit for expressing electric power is:
(a) volt
(b) joule
(c) coulomb
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the voltage across the resistor.
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Fig . shows the essent ial features of a battery operated bell. The hammer strikes the gong when the swi tch is closed . State and explain the effect of using the following material successively to form the core.
(a) Plastic
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A electric bulb is rate 220 V, 60 W. its electric cell resistance is nearly
Using a long extension cord in which each conductor has a resistance of 8Ω, a bulb marked as '100 W, 200 V' is connected to a 220 V dc supply of negligible internal resistance as shown in the figure. The power delivered to the bulb is ______ W.
