Consider a natural parallel plate capacitor where one plate is given by some clouds in the sky and and the other plate is the surface of the earth directly under the cloud. We have a situation where the clouds are 740m above the ground. a) If we consider a cloud area of 1.2km2 what is the capacitance of this capacitor? b) Suppose that the capacitor discharges when the electric field is larger than 5.7 × 105 N/C (lightning!). What is the maximum charge the cloud can hold? (E0 = 8.85 × 10−12 C2/Nm2)
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Consider a natural parallel plate capacitor where one plate is given by some clouds in the sky and and the other plate is the surface of the earth directly under the cloud. We have a situation where the clouds are 740m above the ground.
a) If we consider a cloud area of 1.2km2 what is the capacitance of this capacitor?
b) Suppose that the capacitor discharges when the electric field is larger than 5.7 × 105 N/C (lightning!). What is the
maximum charge the cloud can hold?
(E0 = 8.85 × 10−12 C2/Nm2)
a)
Write the expression for the capacitance and substitute the required values.
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