Page 2 of 2 (b) what is the equivalent capacitance of the circuit below when ci-
ID: 1769689 • Letter: P
Question
Page 2 of 2 (b) what is the equivalent capacitance of the circuit below when ci-50 G-36 F.G-12ja, and in-30 v? , c-30 Ad. Cs Problem # 4 (10 points). It 5.0 × 1021 electrons pass through a 20- resistor in 10 m is the potential difference across the resistor? Problem # s i 0 points): A parallel plate capacitor of capacitance Co has plates of area A with separation d between them. When it is connected to a battery of voltage Vo. it has charge of magnitude Qo on its plates. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging them. After the plates are 2d apart. what is the new capacitance and the potential difference between the plates? Problem # 6 (20 points). At0 the switch s is closed with the capacitor uncharged, if C= 30 , -50 V, and R-10 kf2, what is the potential difference across the capacitor when I- 2.0 mA? R. Problem # 7 (10 points). If a mile of 24-gauge copper wire has a resistance ora 14 a and theresistivity of copper is 1.7 x 10 , . m what is the diameter of the wire? (1 mile = 1-6 km)Explanation / Answer
Problem 4) Potential difference V = iR
= QR/t = 5e21*1.6e-19*20/(10*60)
= 26.67 V answer
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