1. In terms of the most basic SI units (kg, m, s, and C), what is one micro Fara

Question

1.      In terms of the most basic SI units (kg, m, s, and C), what is one micro Farad equivalent to?  (The Farad is the SI unit of capacitance.)

2.      If you have two 10 ?F capacitors in series with each other, what is the equivalent capacitance of the combination?  (Show all work.)

         (a) 0.20 ?F

         (b) 0.50 ?F

         (c) 5.0 ?F

         (d) 20 ?F

4.  Roughly sketch the function y=kx                                    Roughly sketch the function y=k/x

            (where k is some constant)                                          (where k is some constant)

Explanation / Answer

1]

F = A.s/V =J/V^2 =W.s/V^2=C/V =C^2/N.m = (s^2 .C^2)/(m^2.Kg)

so

1 F = (s^2 .C^2)/(m^2.Kg)

1 mu F = 10^-6 (s^2 .C^2)/(m^2.Kg)

2.in series ,

C net =C1*C2/(C1+C2)

C net = (10*10)/(20) = 5 micro F

3.Q = CV,

so for plotting C vs Q,

V must remain costant.

4.

y = kx is a straight line passing through origin.

y = k/x is a rectangular hyperbola

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