[practice problem]
11.1 calculate the instantaneous power and average power absorbed by the passive linear network of Fig11.1 if v(t)¡ë33cos(10t+20 ¡Æ)V and i(t)¡ë33sin(10t+60 ¡Æ)A.
11.2 A current I¡ë33[30 ¡Æ[A] flows through and impedance Z¡ë40[-22 ¡Æ[ohm].Find the average power delivered to the impedance.
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[practice problem]
12.1 Given that V_bn¡ë220[30 ¡Æ[V], find V_an and V_cn, assuming a positive(abc) sequence.
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12.3 one line voltage of a balanced Y-connected source is V_AB¡ë120[-20 ¡Æ[V].if the source is connected to a ¥Ä-connected load of 20[40 ¡Æ[ohm],find the phase and line currents.assume the abc sequence.
12.4 A positive -sequence, balanced ¥Ä-connected source supplies a balanced ¥Ä-connected load.if the impedance per phase of the load is 18+j12[ohm] and I_a¡ë9.609[35 ¡Æ[A],find I_AB and V_AB.
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[practice problem]
15.1 Find the laplace transform of these functions: r(t)¡ëtu(t),that is, the ramp function; Ae^-at * u(t); and Be^(-jwt) * u(t).
15.2 Find th¡¦(»ý·«)
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a) f(t) ¡ë (2t + 4)u(t)
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