A 5.15pF parallel-plate air-filled capacitor with circular plates is to be used

Question

A 5.15pF parallel-plate air-filled capacitor with circular plates is to be used in a circuit in which it will be subjected to potentials of up to 125V . The electric field between the plates is to be no greater than 9750N/C .

As a budding electrical engineer for Live-Wire Electronics, your tasks are to design the capacitor by finding what its physical dimensions must be.

As a budding electrical engineer for Live-Wire Electronics, your tasks are to design the capacitor by finding what its separation must be.

As a budding electrical engineer for Live-Wire Electronics, your tasks are to find the maximum charge these plates can hold.

Explanation / Answer

Potential = 125V

Electric Field = 9750N/C

V = E.d

d = V/E

d = 0.013 m = 13mm

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