Question

A parallel--plate capacitor with air between the plates has an area A=2×104m2 and a plate separation d=1 mm. What is its capacitance?

Answer 1

Answer:

Answer

Area of each plate A=6×10

−3

m

2

Distance between the plates d=3mm=0.003m

Capacitance of capacitor C=

d

Aϵ

o

∴ C=

0.003

6×10

−3

×8.85×10

−12

=17.7pF

Voltage across the capacitor V=100 volts

Thus charge on each plate Q=CV

∴ Q=17.7×10

−12

×100

⟹ Q=1.77×10

−9

C

Explanation:

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