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assume that the voltage applied to a load isand the current flowing through the load isa calculate the complex power s
rc and lr circuits1consider the series lr circuit belowawhat is the time constant of the circuit with s1 closedbwhat is
a single-phase 10-kva 480120-v transformer is to be used as an autotransformer tying a 600-v distribution line to a
in later years motors improved and could be run directly from a 60 hz power supply as a result 25 hz power systems
at a location in europe it is necessary to supply 1000 kw of 60-hz power the only power sources available operate at 50
a paper mill has installed three steam generators boilers to provide process steam and also to use some its waste
suppose that you were an engineer planning a new electric co-generation facility for a plant with excess process steam
assume that the generators field current is adjusted so that the generator supplies rated voltage at the rated load
assume that the generator field current is adjusted to supply 3200 v under rated conditions what is the static
a 412 kv 60 hz 3000-hp 08-pf-leading delta-connected three- phase synchronous motor has a synchronous reactance of 11
a 2300-v 400-hp 60-hz eight-pole y-connected synchronous motor has a rated power factor of 085 leading at full load the
for the motor in problem 6-5 what is the slip at the pullout torque what is the pullout torque of this motorproblem
for the motor of problem 6-5 how much additional resistance referred to the stator circuit would it be necessary to add
a wound-rotor induction motor is operating at rated voltage and frequency with its slip rings shorted and with a load
answer the following questions about the motor in problem 6-21a if this motor is started from a 460-v infinite bus how
if the motor in problem 6-15 is to be driven from a 460-v 50-hz power supply what will the pullout torque be what will
for the op-amp in the voltage follower circuit in figure p1414 the open loop parameters are ao l 5 times 103 ri 10 k
the summing amplifier in figure p1415 has an op-amp with open-loop parameters aol 2 times 103 ri infin and ro 0
the open-loop low-frequency gain of an op-amp is ao 100 db at a frequency of f 104 hz the magnitude of the open-loop
a source has five outputs denoted m1 m2 m3 m4 m5 with respective probabilities 035 025 020 015 005 determine the
a source output consists of four messages m1m2 m3 m4 with respective probabilities 035 03 02 015 determine the binary
a continuous bandpass channel can be modeled as illustrated in figure 1146 assuming a signal power of 50 w and a noise
consider again the bandpass channel illustrated in figure 1146 the noise power spectral density is 10- 5 and the
an analog source has an output described by the probability density functionthe output of the source is quantized into
a binary source has output probabilities 085 015 the channel can transmit 350 binary symbols per second at the capacity