What s the electric field strength inside the capacitor and potential energy of a proton at the midpoint?

What is the electric field strength inside the capacitor and potential energy of a proton at the midpoint of the capacitor in this image?

Answer 1

You’re correct. E = V/d = 300/0.003 = 1E5 V/m
The PE of a proton at the 150 V level, with a charge = 1.602E-19 C, is 150 eV or 150*1.602E-19 J.

Answer 2

Energy stored in a capacitor is related to voltage as follows (assuming the dielectric constant is 1, in the absence of other information): W = (1/2) ε (A/d) V^2 And electric field strength can be calculated from voltage and distance: E = – V/d

Answer 3

Hi, i’m sorry i cant answer this.
but if you are older than 13 and u think ur good at physics please can you help me with this work. its just 3 questions. thanks
http://answers.yahoo.com/question/index;_ylt=AvwJH…

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