Question

If the capacitor in has 0.02 m​2 plates that are 680.76 pm (pico meters) away from one another, determine what dielectric material is in between the plates if the computer was connected to a 100 Volt power supply?

Answer 1

We have

$$S = 0.02 (m^2); d = 680.76 (pm); U = 100 (V); E=6.5 (J)$$

So, capacity

$$C=\frac{\epsilon\epsilon_0 S}{d}$$

Energy of capacitor

$$E=\frac{CU^2}{2}$$

To find dielectric material

$$\epsilon=\frac{2Ed}{\epsilon_0 S U^2}$$

We have

$$\epsilon=\frac{2 \cdot 6.5 \cdot 680.76\cdot 10^{-12}}{8.85\cdot10^{-12}\cdot 0.02\cdot 100^2}=5$$

Answer: Maybe Octyl bromide or Pyrex Glass or porcelain (ceramic)