Design Energy Conversion Devices
Physics · Flashcards · Application
PHYSICS · FLASHCARDS
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QUESTION
Calculate efficiency if
P
useful
=
60
W
P_{\text{useful}}=60\,\text{W}
P
useful
=
60
W
and
P
in
=
80
W
P_{\text{in}}=80\,\text{W}
P
in
=
80
W
.
QUESTION
Calculate input power if efficiency is
0.40
0.40
0.40
and useful output power is
120
W
120\,\text{W}
120
W
.
QUESTION
Calculate useful output if input is
500
J
500\ \text{J}
500
J
and efficiency is
0.20
0.20
0.20
.
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ANSWER
100
J
100\ \text{J}
100
J
.
Useful
=
0.20
×
500
=
100
J
\text{Useful}=0.20\times 500=100\ \text{J}
Useful
=
0.20
×
500
=
100
J
.
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