p33_078

# p33_078 - of V s , V R and V C over the range 0 < f <...

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78. (a) The voltage amplitude for the source is V s = 100 V = IZ = I p R 2 + X 2 C ,f romwh i chw ecan determine the current at each frequency (the explicit dependence of X C on frequency is stated in the solution to part (a) of problem 77). This leads to the voltage amplitude across the resistor V R = IR and the voltage amplitude across the capacitor V C = IX C = Ã V s p R 2 + X 2 C ! X C where X C = 1 2 πCf using the values R = 200 Ω and C =45 ×
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Unformatted text preview: of V s , V R and V C over the range 0 < f < 100 Hz. The falling curve is V C and the rising curve is V R . 20 40 60 80 100 2 4 6 8 1 f (b) The graph indicates that V C and V R are equal at roughly 18 Hz. More careful considerations lead to f = 17 . 7 Hz as the frequency for which V C = V R ....
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## This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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