Two circular plates

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

Two circular plates, each of radius

5.0\,\text{cm}

, are placed parallel to each other in air at a separation of

0.50\,\text{mm}

. Neglecting edge effects, calculate the capacitance of the capacitor thus formed. (a)

0.035\,\text{nF}

(b)

0.14\,\text{nF}

(c)

1.4\,\text{nF}

(d)

0.28\,\text{nF}