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The nameplate on a 460-V 50 hp 60 Hz four pole motor indicatesthat the speed at rated load is 1760 r/min. assume the motor to beat operating load.a) What is the slip of the rotor?b) what is the frequency of the rotor currents?c) what is the angular velocity of the stator field with respect to the stator? with respect to the rotor?d) what is the angular velocity of the rotor field withrespect to the rotor? With respect to the stator?
An x-y plane separates two materials. Material 1 covers z 0 region. There is no surface current or charge on the boundary between the two materials.
A Technician is send to Residential House,and theHome-Owner complains that he doesn't have Emergency-Heat.However,when the Technician arrive the A ir Condition works &Heat works,but the Emergency-Heat still doesn't come on.
Determine the shunt resistance needed to convert a galvanometer to an ammeter with a full scale reading of 10A if the scale requires 2.5mAto cause full deflection with a coil resistance of 10Ω.
a) what is the total resistance of the whole combination b)if the current passing through the combination is 4 amp.find thevoltage across the whole combination and in each resistor c)find the current in each resistor.
Calculate the probability of finding an electron at the bottom edge of the conduction band. Also calculate the probability of not finding an electron at the top edge of the valance band.
Waves and Strings: compute the tension in the top string (i.e. E string, lowest note) of a properly tuned guitar. You will likely need to spend a couple minutes on the internet to obtain length and any other important properties of the string.
A generator (which may be represented by an emf in series with an inductive reactance) is rated 500MVA, 22kV. Its Y-connected windings have a reactance of 1.1 p.u. Find the ohmic value of the reactance of the windings.
The expression for the torque of an induction motor as a function of its slip may be obtained by application of Thevenin's theorem to the circuit model. Show that the Zth obtained can be shown to be approximately equal to Zth = R1+JX1
Discuss the sequence of actions that occur in the operation of an automatic washing machine. Indicate which actions are time-driven and which actions are event-driven.
v(t)=20te^( -40t ) and i(t)=50te^( -40t ) for t>=0 both v and i are zeros for i
a. Draw the block diagram for a coherent receiver for QPSK using the same basis signals as in problems ("What frequency must be used for basis symbols f1 = sin(pi*ct) and f2 = cos(pi*ct) with a symbol period of 1/(9600Hz) to contain 6 cycles of th..
Digital voltmeters often have a choice of ranges. The ranges indicated on a typical voltmeter are 0-3, 0-30, 0-300, and 0-3000AC volts. The output is represented with four significant digits. Determine the resolution uncertainty for each range.
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