What is the electrostatic energy density stored in an electric field of magnitude in vacuum? ()

Answer and explanation

Correct answer: A.

  1. Step 1: State the electrostatic energy density formula: .
  2. Step 2: Substitute values: and .
  3. Step 3: Calculate: .
Answer
.
Why not the others: omits the factor of (calculating ); multiplies by 2; divides by an extra factor of 2.

Practise more Capacitance.

Free questions with an explanation for every one, and full timed JEE Main mock tests.