A wave is incident on the surface of a mirror at an angle of 41° with the normal. What can you say about its angle of reflection
2 answers:
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Answer:
Explanation:
The capacitance of a parallel-plate capacitor is given by
where is the vacuum permittivity, A is the surface area of the plates, d their separation.
We also know the following relationship
where Q is the charge stored on the capacitor and V the potential difference between the plates.
Combining the two equations,
We also know that for a uniform electric field (such as the one between the plates of a parallel-plate capacitor), we have
where E is the magnitude of the electric field. Substituting into the previous equation and re-arranging it,
For the capacitor in the problem:
is the area of the plates
is the maximum electric field before a spark is produced
Solving for Q, we find the maximum charge that can be added before that occurs: