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Electric field, PD and forces exerted Q

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It's a simple question, but should the pd on the electrons be 80V ??? They are half way between the two plates so distance becomes 0.025m. Using f=EQ I get force etc.

I get the same answer but it's not shown in the markscheme, they just do it as if the electron was at the bottomising 160V and 5cm .So is my method technically correct?

Thanks! -Jay

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Reply 1

krisshP

Original post by Jaydude

Electric field strength E is constant in a uniform electric field, so E=V/d=p.d. across plates/plates' separation=160/(5 X 10^-2)=3200 Vm^-1 no matter where something is in a uniform electric field, E is the same.

I THINK they look at answer first then, if wrong/needed, they look at your working out. So I THINK it's still okay.

Krishna