homework5

# homework5 - PHYS 3320 UNIVERSITY OF COLORADO AT BOULDER...

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PHYS 3320 UNIVERSITY OF COLORADO AT BOULDER PRINCIPLES OF ELECTRICITY AND MAGNETISM II SPRING , 2010 (AM Rey) Homework 5 (Due Date: Fri, Feb 19, in class. Recall: late homework will not be accepted ) NOTE: Be sure to show your work and explain what you are doing 1. RLC SERIES CIRCUIT [30 points] Consider the RLC series circuit shown in the ﬁgure; ﬁrst we’ll use a battery to supply EMF, then an AC power supply. (a) Consider the DC circuit. If the switch is open, but then closed at time t = 0, what is the current through the capacitor as a function of time? Also, what is the voltage across the capacitor as a function of time? (b) Now replace the battery with an ideal AC power supply that provides a voltage V 0 sin ωt . After letting all the transients from turning on the power die away, what is the current through the capacitor as a function of time? Make a sketch of the magnitude of the current as a function of frequency . 2. Force on permeable rod in solenoid [30 points]

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homework5 - PHYS 3320 UNIVERSITY OF COLORADO AT BOULDER...

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