Question

Each plate of a parallel plate condenser has surface area of 5 cm². The distance between the plates is 2 mm. The dielectric constant of the medium between the plates is 5. Then the capacity of the condenser is ____________.

(`epsilon_0 = 8.85  xx 10^-12 C^2//Nm^2`)

Options

• 15 pF

• 12.5 pF

• 7.5 pF

• 11 pF

Answer 1

Each plate of a parallel plate condenser has surface area of 5 cm². The distance between the plates is 2 mm. The dielectric constant of the medium between the plates is 5. Then the capacity of the condenser is 11 pF.

Explanation:

`C = (AKepsilon_0)/d = ((5 xx 10^-4) xx 5 xx 8.85 xx 10^-12)/(2 xx 10^-3)`

`= 1.10 xx 10^-11`

`= 11 xx 10^-12  "F"`

`= 11"pF"`