Question

A parallel plate capacitor of capacitance \(1\ \mu\text{F}\) is charged to a potential difference of \(20\ \text{V}\). The distance between plates is \(1\ \mu\text{m}\). The energy density between plates of capacitor is:

• A. \(1.8\times 10^3\ \text{J/m}^3\)
• B. \(2\times 10^3\ \text{J/m}^3\)
• C. \(2\times 10^2\ \text{J/m}^3\)
• D. \(1.8\times 10^5\ \text{J/m}^3\)

Hint:

For capacitor energy density, first calculate \(E=\frac{V}{d}\), then use \(u=\frac{1}{2}\varepsilon_0E^2\).

Answer 1

The Correct Option is A