The two parallel plate electrodes give the solar cell an inherent capacitance. If the distance between the plates in Figure 1 were increased from 20 µm to 40 µm, the capacitance would:A.increase by a factor of 2.B.increase by a factor of 4.C.decrease by a factor of 2.D.decrease by a factor of 4.
Question
The two parallel plate electrodes give the solar cell an inherent capacitance. If the distance between the plates in Figure 1 were increased from 20 µm to 40 µm, the capacitance would:A.increase by a factor of 2.B.increase by a factor of 4.C.decrease by a factor of 2.D.decrease by a factor of 4.
Solution
The capacitance (C) of a parallel plate capacitor is given by the formula:
C = ε * (A/d)
where: ε is the permittivity of the material between the plates, A is the area of one of the plates, and d is the distance between the plates.
From this formula, we can see that the capacitance is inversely proportional to the distance between the plates. This means that if the distance (d) is doubled, the capacitance (C) would be halved.
Therefore, the correct answer is C. decrease by a factor of 2.
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