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Sketch the torque speed characteristic of a delta-connected 220-V-rms 5-hp four-pole 60-Hz three-phase induction motor. Estimate values and label key features for things such as the full-load running speed, the full-load torque, the pull-out torque, and the starting torque. Estimate the full-load line current and the starting line current.
The voltage and current at the terminals of the circuit element are zero for t = 0 they are v = (10,000t+ 5)e^-400t V. and i = (40t + 0.05)e^-400t A. a) at what instant of time is maximum power delivered to the element
you want to put in marble counter tops, but you dont want them to take up more than 1/20 of the space in you kitchen. what is the largest area the counters can take up?
A 3-phase, 20 kVA, 208 V, 4-pole star-connected synchronous generator has a synchronous reactance of Xs = 1.5 ohm per phase. The resistance of the stator winding is negligible. The machine is connected to a 3-phase 208 V infinite bus.
Suppose that an inductor is formed by N turns of a conductive wire wound around a magnetic material. The magnetic material forms a circular cylinder of radius r = 10 cm, and height h = 5 cm. The inductance of the inductor turns of N is defined as:..
A radio receiver has a noise power N = kTB watts, with T = 100 K and B = 1.0 MHz. The value of k is 1.38 x 10^-23 J/K. What is the noise power in dBW?
Understanding the Trends that are re-shaping the world and understanding the Future Workplace and Future Workforce -2020
You have an amplifer with a nominal open-loop gain of 1000 (A = 1000), but the variance in the gain is 20% (meaning that the open-loop gain ranges in value from 800 to 1200). You want to use feedback to try to desensitize the gain.
The vending machine sells soda for $1.50 per bottle. The machine also accepts D($1 bills) and Q(quarters= $.25). When the sum of money is greater than $1.50, i.e. two $1 bills, the machine returns change in the coin return (two quarters).
What are the consequences of high harmonic distortion levels? and what are the Negative Consequences of Harmonics on Plant Equipment ?
A pitot-static probe is used to measure the velocity of150 C water. If the reading of the connected pressure transducer is 20 cm of water, what is the water velocity Did you need to make any assumptions andif so, what
Calculate the E-field generated at all points by concentric spheres of surface charge that are centered at the origin. Assume that inner and outer sphers have radii ra and rb and surface charge densities Psa and Psb, respectively.
A known vapor pressure value for ethanol is 221.3 mmhg. what temperature does this vapor pressure compressed to when compared to ethanol's boiling point.
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