Question

Most modern TVs have an “instant warm-up” feature. Even though the set appears to be off, it is “off” only in that there is no picture and audio. To provide a “quick on” feature, the TV’s electronics are kept ready. This takes about 10 W of electric power, constantly. Under these conditions, what is
(a) The current in the TV and
(b) The resistance of the TV?
(c) Assuming that there is one TV with this feature for every two households, estimate how many electric power plants this feature takes to run just in the United States.


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  • CreatedAugust 29, 2015
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