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homework2 - ʼ ll need certain physical constants of copper...

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Physics 334, Winter Quarter 2012 Homework Assignment 2 Due Tuesday January 17 in class or in my mail box before the end of class. 1. Diode/power circuits. Consider the half-wave rectifier below. Assume the transformer output has amplitude 10.0 V and the diode forward voltage drop is zero. (a) What ʼ s the average output voltage? (b) What ʼ s the RMS output voltage? 2. Estimation. Four one- μ F capacitors are connected in parallel and charged to 200 V, then discharged through a 2-inch length of 30 AWG (American Wire Gauge) copper wire. Do you expect the wire to melt? Why or why not? To attack this problem, you
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Unformatted text preview: ʼ ll need certain physical constants of copper; include in your answer a table of the physical constants you used. 3. Zener power circuits. Below is the I-V curve of a 30 V zener diode. (a) Estimate the dynamic resistance of this diode when operating in the “zener region” at “reasonable” currents. (b) Suppose you want to produce a well-regulated 30 ± 0.5 V voltage from a poorly-regulated 50.V ± 5.V power supply in the manner of the circuit in text figure 1.14. Find a reasonable value of the series resistor R; specify the resulting zener current and output voltage “wiggle”....
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