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The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage ...

The energy stored in a capacitor of capacitance 5μF is 40J. Calculate the voltage applied across its terminals?
Take Free Practice Test On 2026 JAMB UTME, Post UTME, WAEC SSCE, GCE, NECO SSCE
  • A 4000V
  • B 200V
  • C 16V
  • D 6V
  • E 4V
Correct Answer: Option A
Explanation:
\(E = \frac{CV^{2}}{2}\)
\(V^{2} = \frac{2E}{C}\)
\(V^{2} = \frac{2\times 40}{5 \times 10^{-6}}\)
\(V^{2} = 16 \times 10^{6}\)
\(V = 4 \times 10^{3} = 4000v\)

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