Answer to Question #303522 in Electricity and Magnetism for Ron

Question

What is the change in potential energy when a +3.5 C point charge was moved from a negative plate to a positive plate with a potential difference of 8V?

Answer 1

Now we know that

Change in potential energy

$U=-q∆V$

Where

$q=3.5C\\∆V=8V$

$U=-3.5\times8=-28J$