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Physics
Physics
Problem
Identify the correct expression for electrical power
P
P
P
dissipated in a resistor of resistance
R
R
R
carrying a current
I
I
I
. a)
P
=
1
2
I
2
R
P = \dfrac{1}{2} I^{2} R
P
=
2
1
I
2
R
b)
P
=
2
I
2
R
P = 2 I^{2} R
P
=
2
I
2
R
c)
P
=
I
2
R
P = I^{2} R
P
=
I
2
R
d)
P
=
2
I
2
R
P = \sqrt{2}\, I^{2} R
P
=
2
I
2
R
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