The quaantity 1/2 εoE2 has the significance of:
Correct answer: C. Energy per volume
- A. Energy per farad
- B. Energy per coulomb
- C. Energy per volume
- D. Energy
Explanation
The expression 1/2 εoE2 represents the energy density in an electric field, which is the energy stored per unit volume. Thus, the correct answer is 'Energy per volume'.Option A, 'Energy per farad', is incorrect because it implies a connection to capacitance, not energy density. Option B, 'Energy per coulomb', is incorrect as it refers to energy per unit charge, not volume. Option D, 'Energy', is too broad and does not specify the per unit volume aspect of the expression.
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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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