A capacitor is charged to and then connected in parallel with an uncharged capacitor. What is the loss of electrostatic potential energy during the redistribution of charge?

Answer and explanation

Correct answer: C.

  1. Step 1: The formula for the loss of electrostatic energy when two capacitors are joined in parallel is .
  2. Step 2: Substitute , , , and .
  3. Step 3: Compute: .
Answer
.
Why not the others: is the initial total stored energy (); is the final remaining energy; halves the loss.

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