Students will understand and apply the equations governing capacitors hooked up in series and parallel.
Key Equations
Example 1
Two capacitors, one of
Solution
(a): To find the total capacitance, we'll use the equation give above for determining the equivalent capacitance of capacitors in series.
(b): Since charge is the same across capacitors in series, we can use the charge found using the total capacitance and the total voltage drop to find the charge in the
(c): Since we know the charge and the capacitance of
Example 2
The two capacitors used in the previous example problem are now connected to the battery in parallel. What is (a) the total capacitance and (b) the charge on
Solution
(a): To find the total capacitance, we'll us the equation given above for capacitors in parallel.
(b): Now, since the voltage across capacitors in parallel is equal, we can find the charge on
Watch this Explanation
Simulation
Note: go to the third tab to see circuits with multiple capacitors.
Capacitor Lab (PhET Simulation)
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42μF and one39μF all wired in parallel. Draw the schematic and calculate the total capacitance of the system .  You have two
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 If the charge on the plates is
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 Consider the capacitor connected in the following circuit at point
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 Calculate the current through and the voltage across the resistor if
Answers

123μF 
0.073μF  a.
6V b.0.3A c.18V d.3.6×10−4C e.3.2×10−3J f. i)80μF ii)40μF iii)120μF