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An electric travel blanket uses a car's 12V supply. The current is 3A. a) What is the power of the blanket? b) How much energy does it transfer if it is switched on for 10 minutes?
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An electric travel blanket uses a car's 12V supply. The current is 3A.

a) What is the power of the blanket?

b) How much energy does it transfer if it is switched on for 10 minutes?

User Naumov
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1 Answer

4 votes

For electrical devices . . .

Power dissipated = (voltage) x (current) =

(12 V) x (3.0 A) = 36 watts .

1 watt means 1 joule per second

(36 joule/sec) x (60 sec/min) x (10 min) = 21,600 joules

User Aleksandr Petrov
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