A cylindrical capacitor is made of two concentric cylinders. The inner cylinder has radius r₁ = 4 mm, and the outer one a radius r₂= 8 mm. The common length of the cylinders is L = 150 m. What is the potential energy stored in this capacitor when a potential difference V = 4 V is applied between the inner and outer cylinder?

Question

Quizplus · Accepted Answer

The capacitance of a cylindrical capacitor is given by C = (2πε₀L) / ln(r₂/r₁). The potential energy stored is U = 0.5 * C * V². Substituting the given values, we find the potential energy to be approximately 9.6 × 10⁻⁸ J.

A Cylindrical Capacitor Is Made of Two Concentric Cylinders