Meg020500 Meg020500

30-10-2015
Physics

Answered

An electric travel blanket uses a car's 12V supply. The current is 3A.

AWhat is the power of the blanket?

BHow much energy does it transfer if it is switched on for 10 minutes?

Verified Answer :

30-10-2015

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

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