Imagine parallel plates are placed in an external electric field as shown below. What will be...
Imagine parallel plates are placed in an external electric field as shown below. What will be different in each pictured case? How does the value of C change?
Homework Answers
In each case, the voltage will be different.
Each capacitor will have its own internal E field going from the positive plate to the negative plate.
In the three cases, the Eext wil either add to the Eint, or get subtracted or do nothing.
In the 1st case, the Eext is opposite to Eint, so they will be subtracted.
In 2nd case, they will be added.
In the 3rd case, as the fields are normal, so they will not be affected by one another.
And as V is directly proportional to E, it will vary in the similar manner.
The value of capacitance C will vary inversely, as it is inversely proportional to V.
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