OnlineCBT
Physics · Electrostatic Potential
हिन्दीGiven below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Electrostatic energy stored in a charged capacitor resides entirely in the electric field localized in the space between the plates. Reason (R): Energy density of an electrostatic field \( E \) in a vacuum is given by \( u = \frac{1}{2} \varepsilon_0 E^2 \). In the light of the above statements, choose the correct answer from the options given below:
Correct answer · Option 2
Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
Explanation
Both statements are factually correct. The formula for energy density defines energy per unit volume, but the conceptual physical viewpoint that energy resides in the field is a fundamental principle of electromagnetism, so (R) is a valid formula rather than the full explanatory reason for (A).
