The quantity 1/2 εo E2 has the significance of:
Correct answer: C. energy/voulme
- A. energy/farad
- B. energy/columb
- C. energy/voulme
- D. energy
Explanation
The expression represents the energy stored per unit volume in the electric field. It is derived from the energy density formula for an electric field, which is given by:U = 1/2 εo E2. Here, εo is the permittivity of free space and E is the electric field strength.So, 1/2 εo E2 is the energy density associated with the electric field.
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Electrostatics describes forces between charges through Coulomb's law, electric fields and field intensity, then uses electric potential to measure energy per unit charge. Capacitors store charge and electrical energy, with capacitance depending on geometry and dielectric material, not simply on the amount of charge present.
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