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Energy stored per unit volume is given by:
- 1/2 ε0 E^2
- 1/2 ε0 V^2 / d^2
- 1/2 ε0 V^2 / d
- 1/2 ε0 V / d
Correct answer: 1/2 ε0 E^2
Solution
The energy density (energy stored per unit volume) in an electric field is given by the formula u = 1/2 ε0 E^2, where ε0 is the permittivity of free space and E is the electric field strength.
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