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Class 12
Physics
Electrostatic Potential and Capacitance
what is the area of the plates of a 2 f parallel p...

Question:
What is the area of the plates of a 2 F parallel plate capacitor, given that the separation between the plates is 0.5 cm? [You will realize from your answer why ordinary capacitors are in the range of µF or less. However, electrolytic capacitors do have a much larger capacitance (0.1 F) because of very minute separation between the conductors.]

Answer:

Capacitance of a parallel capacitor, V = 2 F

Distance between the two plates, d = 0.5 cm = 0.5 × 10 ^{- 2}m

Capacitance of a parallel plate capacitor is given by the relation,

Where,

= Permittivity of free space = 8.85 × 10 ^{- 12} C² N ^{- 1} m ^{- 2}

Hence, the area of the plates is too large. To avoid this situation, the capacitance is taken in the range of µF.

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