- #1
bedarder
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Homework Statement
[PLAIN]http://dl.dropbox.com/u/14443433/Screen%20shot%202011-02-25%20at%2011.02.23%20AM.PNG
Homework Equations
Q = C*V
E-field = V/d
F = E*q
C = epsilon-naught*A/d
The Attempt at a Solution
A.
false based on
F = E*q
= Vq/d
= C*V^2/d
B.
true based on the inverse relationship demonstrated above
C.
false because as d is varied, there is a change in force, and this force will affect the charge, q, as per F = Vq/d
D.
false because isn't the electric field constant everywhere, and doesn't depend on distance?
E.
true because
Q = C*V
= epsilon-naught*A*V/d
the negative sign comes into play based on http://www.physics.upenn.edu/courses/gladney/phys151/lectures/images/charging_capacitor_circuit.gif" picture I found on google images. I'm not actually sure why the capacitor charges in that manner, though.
Since B and E were true, my answer was "BE" which is wrong.
Help?
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