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# written_ass3.pdf - Phys 122 Assignment#3 Chapter 19/21...

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Phys 122 Assignment #3 Chapter 19/21: Capacitors and RC Circuits 1. A parallel-plate capacitor is constructed using plates of area of 30 cm x 50 cm separated by a piece of neoprene (κ=6.7 and E max =11x10 6 V/m) with a thickness of 0.23 mm. a) Find the capacitance of the capacitor. b) Find the maximum voltage and charge that the capacitor can withstand. Consider two such capacitors connected in parallel. c) Find the capacitance of the system. d) Find the maximum voltage and charge that the system can withstand. Consider two such capacitors connected in series. e) Find the capacitance of the system. f) Find the maximum voltage and charge that the system can withstand. 2. Four capacitors (initially uncharged) are connected to a battery as shown. Find the charge stored on each capacitor. 3. An uncharged 50.0 µF capacitor is charged by an 18.0 V battery through a 125 kΩ resistor. The charging begins at t=0 s. Determine the following … a) The time constant of the circuit.

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