F96(1) - Physics 4B SECOND EXAM Chapters 26 - 28 Fall 1996...

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1 Physics 4B SECOND EXAM Chapters 26 - 28 Fall 1996 Name:_________________________________________ Solve the following problems in the space provided. Use the back of the page if needed. Each problem is worth 20 points. You must show your work in a logical fashion starting with the correctly applied physical principles which are on the last page. Your score will be maximized if your work is easy to follow because partial credit will be awarded. 1. In the circuit at the right, the battery voltage is 30.0V. Find (a)the equivalent capacitance, (b)the total charge that flows through the battery (c)the charge on each capacitor and (d)the potential difference for each capacitor (C 1 =40.0μF, C 2 =80.0μF, and C 3 =60.0μF). (a) C 1 and C 2 are in parallel so, C p = C 1 + C 2 = 120 μ F This capacitance is in series with c3, 1 C eq = 1 C p + 1 C 3 C eq = C p C 3 C p + C 3 = 40.0 μ F (b)Using the definition of capacitance, C Q V Q = CV = (40)(30) = 1200 μ C (c)C 3 is in series with the battery so it’s charge is the same as the
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F96(1) - Physics 4B SECOND EXAM Chapters 26 - 28 Fall 1996...

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