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A 460-V, three-phase, six-pole, 60-Hz, 150-kW, wound-rotor induction motor develops an internal torque of 190 percent with a line current of 200 percent (torque and current expressed as a percentage of their full-load values) at a slip of 5.6 percent when running at rated voltage and frequency with its rotor terminals short-circuited. The rotor resistance is measured to be 90 mO between each slip ring and may be assumed to remain constant. A balanced set of Y-connected resistors is to be connected to the slip rings in order to limit the rated-voltage starting current to 200 percent of its rated value. What resistance must be chosen for each leg of the Y connection? What will be the starting torque under these conditions?
Construct a nontrivial resistive circuit with at least two loops and at least three resistors in each loop. Verify Kirchho's laws for this circuit both theoretically and empirically. Notice that this item is more open-ended.
Calculate the standard enthalpy change for the reaction of an aqueous solution of barium hydroxide, Ba(OH)2, with an aqueous solution of ammonium nitrate, NH4NO3, at 25°C. The complete ionic equation is
The line voltage is 120V, the armature resistance is 0.7 Ω and the series field-winding resistance is 0.5Ω. What is the torque developed by the motor. For the motor to operate at a speed of 2400rpm,
A potentiometer is wired to represent a range of 0 - 180 degrees. The potentiometer is supplied with a voltage of 15 Vdc. What is the output voltage at 75 degrees
1.Apply the tools and techniques in research and analysis required to evaluate computer and information science products.2.Describe how pipelining and superscalar processing improve the speed at which a computer program is executed.
Use the above transfer function and BLT to design a corresponding IIR digital lowpass filter with a cutoff freqency of 15 Hz and a sampling rate of 120 Hz. a. Write the transfer function of the digital filter.
Let a 4x inverter have transistors four times as wide as those of aunit inverter. If a unit inverter has three units of inputcapacitance and parasidic delay of pinv, what is the input capacitance of a 4x inverter
A signal has a fundamental frequency of 1000 Hz. What is its period? Assume the signal has a peak amplitude of 1 Volt and that the instantaneous power is equal to the square of the voltage, then compute the average power of the fundamental frequen..
A 50V DC source is connected in series with a switch, an 8.2k ohm resistor, and a 0.01 microfarad capacitor. There is no initial charge on the capacitor and the switch is open. Determine both A & B The time at which the capacitor is fully charged
explain the use of the Op Amp as a difference amplifier and as a comparator. What are the distinctions between the ways each one is used.
how can one go about to decode a message from a wav file. the wave contain a coded message in form numbers. which is represented in the wave in form of tones
where x is a state variable and r is an input variable. Perform a change of variables in r, i.e., r (t) --> u (t),where the new system is linear without any approximations (hint: assume x (t) ismeasurable)
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