33. (a) The generator emf is a maximum when sin(ωdt– π/4) = 1 or dt– π/4 = (π/2) ± 2nπ[n= integer]. The first time this occurs after t= 0 is when dt– π/4 = π/2 (that is, n= 0). Therefore, td===×−33673 103π4π4(350rad / s)s.. (b) The current is a maximum when sin(dt– 3π/4) = 1, or dt– 3π/4 = (π/2) ± 2nπ[n= integer]. The first time this occurs after t= 0 is when dt– 3π/4 = π/2 (as in part (a), n= 0). Therefore, td=×−55112 102π4π4(350rad / s)(c) The current lags the emf by /2π+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.