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A 3 phase, 60 Hz, 4 pole, 440-v (line-line, rms) induction motor drive has a full-load (rated) speed of 1746 rpm. The rated torque is 40Nm. Keeping the air gap flux-density peak constant at its rated value and (if the load is a centrifugal load that demands a torque, proportional to the speed squared, such that it equals the rated torque of the motor at the rated speed:
1) plot the torque speed characteristics for the following values of the frequency 60, 45, 30, 15 Hz.2) calculate the speed of operation at the 4 values of the frequency
Discuss why frequency limits are critical in design of digital integrated circuits. Discuss what is meant by the "complete response" of an RLC circuit. Describe the two "parts" that make up this response.
a) Given that the refractive index of water is about 1.33, what is the polarization angle for light traveling in air and reflected from the surface of water b) Consider a diver in sea pointing a flashlight towards the surface of the water.
Two resistors are given: R1 = 470 ohms and R2 = 1.20 k ohms. (a) The two resistors are connected in series with a 48 V source. Calculate the series equivalent resistance. Sketch the schematic diagram of the circuit with the two resistors.
A person shuffling across a dry carpet can be approximately modeled as a charged100-pF capacitance with one end grounded. If the person touches a grounded metallic object such as a water faucet.
b) Draw the LFSR circuit to generate the CRC. Generate the CRC by applying the data pattern to the LFSR and verify the answer in part a. c) An error vector is given by X7+ X6+ X4+ X3+1. What is the received bit pattern corresponding to part a
A 3-phase, 11 kV, round-rotor synchronous generator delivers power to an infinite bus whose line-to-line voltage is constant at 11 kV rms. The effective stator resistance and synchronous reactance per phase of the synchronous generator are respectiv..
The middle C string on a piano is under a tension of 970 N. The period and wavelength of a wave on this string are 3.82 ms and 1.18 m, respectively. Find the linear density of the string.
In an FM line of sight link , the frequency is 6 GHz and the beamwidth = 27 MHz the transmitting and receiving antennas have a gain of 33 dB , the receiving antenna is 40 Km apart from the transmitting station
A particle having charge q and mass m, initially at rest, is accelerated through a potential difference V0. Find the final speed (assume nonrelativistic).
Determine the relative permittivity of the dielectric, the maximum and minimum electric field intensities in medium 1 and the electric field intensity in medium 2.
A Fabry-Perot interferometer is to be used to resolve the mode structure of a He-Ne laser operating at 632.8 nm. The frequency separation between the modes is 150 MHz. The plates are separated by an air gap and have a reflectance of r^2=0.999.
Determine the temperature in the middle of the bar and evaluate it at t = 1, 2, 3, 10, 50 sec. First guess, and then calculate. Also, plot the temperature expression vs. time from t = 1 to 50 sec using Excel
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