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An electrical motor on 15V supply draws a current of 5A and yields mechanical powers of 60W,the energy lost as heat in one hour(in kj)v
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asked
Jan 2, 2019
in
Class 10
by
kratos
cbse
magnetic effects of electric current
electricity
available energy
thermodynamics
class-9
class-10
reversible work
electromagnetism
magnetism
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1
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answered
Sep 18, 2020
by
kratos
Best answer
Input power =VI=15×5=75W
Output power = 60W Power lost = 15 W
Energy lost =15×60×60
= 54000 J = 54k J
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