Question

a charged capacitor stores 10 c at 40 v. its stored energy is o 400 j o 1.25 j o 4 j o 2.5 j o 200 j save for later

Explanation:

Step1: Recall energy formula for capacitor

The energy stored in a capacitor is given by $U=\frac{1}{2}QV$, where $Q$ is the charge and $V$ is the potential - difference.

Step2: Substitute given values

We are given $Q = 10\ C$ and $V=40\ V$. Substitute these values into the formula: $U=\frac{1}{2}\times10\times40$.

Step3: Calculate the energy

$\frac{1}{2}\times10\times40 = 200\ J$.

Answer:

200 J