p33_035 - 35. (a) The generator emf is a maximum when sin(d...

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35. (a) The generator emf is a maximum when sin( ω d t π/ 4) = 1 or ω d t π/ 4=( π/ 2) ± 2 [ n = integer] . The Frst time this occurs after t =0iswhen ω d t π/ 4= π/ 2 (that is, n = 0). Therefore, t = 3 π 4 ω d = 3 π 4(350 rad / s) =6 . 73 × 10 3 s . (b) The current is a maximum when sin( ω d t 3 π/ 4) = 1, or ω d t 3 π/ 4=( π/ 2) ± 2 [ n = integer] . The Frst time this occurs after t =0iswhen ω d t 3 π/ 4= π/ 2 (as in part (a), n = 0). Therefore, t = 5 π 4 ω d = 5 π 4(350 rad / s) =1 . 12 × 10 2 s . (c) The current lags the emf by + π 2 rad, so the circuit element must be an inductor. (d) The current amplitude
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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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