Question

Asked Nov 11, 2019

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Imagine that two parallel plates are charged to achieve a voltage difference Vo between the plates. They have area A and spacing d. The plates are then electrically isolated so that no charge can be added or taken away. A good conductor of thickness d/2 is placed in between the two plates, as shown. How about the electrical stored energy, using the formula U = (1/2) QV? What was it before, and what is it now?

Step 1

Initial potential difference is,

Step 2

When the conductor is placed between the plates, the electric field inside the conductor is zero.

Step 3

The new potential di...

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