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Physics
Electricity
Circuit Energy Transfers
Power
Power
What You Need to Know
Explain how power transfer in a circuit device relates to potential difference, current, and energy changes.
Calculate power using the equations:
P
=
V
I
P = V I
P
=
V
I
P
=
I
2
R
P = I^2 R
P
=
I
2
R
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1
Power
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