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Physics
Physics
Problem
For a parallel-plate capacitor that carries a charge
Q
Q
Q
and has a potential difference
Δ
V
\Delta V
Δ
V
across its plates, which of the following expressions gives the energy
U
C
U_{C}
U
C
stored in the capacitor? a)
2
Q
Δ
V
2\,Q\,\Delta V
2
Q
Δ
V
b)
Q
Δ
V
Q\,\Delta V
Q
Δ
V
c)
1
2
Q
Δ
V
\dfrac{1}{2}Q\,\Delta V
2
1
Q
Δ
V
d)
1
4
Q
Δ
V
\dfrac{1}{4}Q\,\Delta V
4
1
Q
Δ
V
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