Babalola March 7, 2018 magnitude of the change in the electric potential energy
ID: 2268909 • Letter: B
Question
Babalola March 7, 2018 magnitude of the change in the electric potential energy of an electron that moves between the ground and the cloud? (Note: your answer should be in Volts) 2. Three parallel plate capacitors, each having a capacitance of 1.0 F are connected in series, what is the equivalent capacitance? 3. Two parallel-plate capacitors, 6.0 mF each, are connected in parallel to a 10 V battery. One of the capacitors is then squeezed so that its plate separation is 50.0% of its initial value. Because of the squeezing, (a) how much additional charge is transferred to the capacitors by the battery and (b) what is the increase in the total charge stored on the capacitors? 4. Each of the uncharged capacitors in the figure below has a capacitance of 25.0 microF. A potential difference of V = 4200 is established when the switch is closed. How many coulombs of charge then pass through meter A?Explanation / Answer
2)We have,
C1 = C2 = C3 = 10 uF
We know when the capacitors are connected in series, the equivalent capacitance is given by:
1/Ceq = 1/C1 + 1/C2 + 1/C3
1/Ceq = 1/1 + 1/1 + 1/1
Ceq = 1/3 = 0.33 uF
Hence, Ceq = 0.33 uF
3)Given,
C1 = C2 = 6 mF
a)before squeezing the charge on the capacitor is:
Q1 = Q2 = 6 x 10^-3 x 10 = 60 mC
after squeezing, the capacitance of that one doubles, so
Q1' = 2 x 60 = 120 mC
Q2 = 60 mC
Additional charge is:
Qa = 120 - 60 = 60 mC
Hence, Qa = 60 mC
b)Increase in total charge is:
Q = 120 - 60 = 60 mC
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