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Which of the following expressions gives the electrical power dissipated in a…
PHYSICS · Single correct · GCSE · Physics · Electricity · Electricity
Problem
Which of the following expressions gives the electrical power dissipated in a resistor only in terms of the potential difference
V
V
V
across it and its resistance
R
R
R
? (a)
V
2
2
R
\dfrac{V^{2}}{2R}
2
R
V
2
(b)
2
V
2
R
2\,\dfrac{V^{2}}{R}
2
R
V
2
(c)
V
2
R
\dfrac{V^{2}}{R}
R
V
2
(d)
V
2
2
R
\dfrac{V^{2}}{\sqrt{2}\,R}
2
R
V
2
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