Question Detail
Question
Capacitance 15F and 5F are connected in parallel across a 20V battery. What is the energy stored?
Correct Answer
Option A is the correct answer.
Detailed Explanation
For capacitors connected in parallel, the equivalent capacitance (C_eq) is the sum of individual capacitances:C_eq = C1 + C2 = 15 F + 5 F = 20 F.The energy (E) stored in a capacitor is given by the formula: E = 1/2 * C * V².Given V = 20 V.E = 1/2 * (20 F) * (20 V)² = 1/2 * 20 * 400 = 10 * 400 = 4000 J.
Hint
First, find the equivalent capacitance for parallel connection. Then use the formula for energy stored in a capacitor.