Question

A capacitor has charge 50 µC. When the gap between the plate is filled with glass wool, then 120 µC charge flows through the battery to capacitor. The dielectric constant of glass wool is ______.

Options

• 1.40

• 2.40

• 3.40

• 4.40

Answer 1

A capacitor has a charge of 50 µC. When the gap between the plate is filled with glass wool, then 120 µC charge flows through the battery to the capacitor. The dielectric constant of glass wool is 3.40.

Explanation:

Δq = (K – 1)CV

120 = (K - 1) 50

K = `120/50` + 1

= 3.4