ch31-p033 - 33. (a) The generator emf is a maximum when...

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33. (a) The generator emf is a maximum when sin( ω d t π /4) = 1 or d t π /4 = ( π /2) ± 2 n π [ n = integer]. The first time this occurs after t = 0 is when d t π /4 = π /2 (that is, n = 0). Therefore, t d == = × 33 673 10 3 π 4 π 4(350 rad / s) s. . (b) The current is a maximum when sin( d t – 3 π /4) = 1, or d t – 3 π /4 = ( π /2) ± 2 n π [ n = integer]. The first time this occurs after t = 0 is when d t – 3 π /4 = π /2 (as in part (a), n = 0). Therefore, t d = × 55 112 10 2 π 4 π 4(350 rad / s) (c) The current lags the emf by /2 π + rad, so the circuit element must be an inductor.
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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