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Mathematics
Problem
Which of the following expressions correctly relates electrical power (P) to potential difference (V) and current (I)? a)
P
=
1
2
V
I
P = \dfrac{1}{2}\,VI
P
=
2
1
V
I
b)
P
=
2
V
I
P = 2VI
P
=
2
V
I
c)
P
=
V
I
P = VI
P
=
V
I
d)
P
=
V
I
2
P = \dfrac{VI}{\sqrt{2}}
P
=
2
V
I
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