Electric Power
AP Physics C Electricity and Magnetism · Flashcards
AP PHYSICS C ELECTRICITY AND MAGNETISM · FLASHCARDS
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QUESTION
Identify the power dissipated in a circuit with
8
V
8 \text{ V}
8
V
and
4
A
4 \text{ A}
4
A
.
QUESTION
Determine the power dissipated when
400
J
400 \text{ J}
400
J
is used in
5
s
5 \text{ s}
5
s
.
QUESTION
What is the power dissipated if
3
A
3 \text{ A}
3
A
flows through
10
Ω
10 \text{ }\text{Ω}
10
Ω
?
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ANSWER
90
W
90 \text{ W}
90
W
. Using
P
=
I
2
R
=
3
2
×
10
=
90
P = I^2R = 3^2 \times 10 = 90
P
=
I
2
R
=
3
2
×
10
=
90
W.
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