If there is a current of 2.0 A through a hair dryer transferring 15 kJ of energy in 55 s, what is the
potential difference across the dryer?
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Answer:
I= 2A
W=15KJ= 15000J
t= 55sec
v=?
W=VIt
V=W/It
V= 15000 / 2 X 55 =136.36 V
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