Engineering, 10.11.2020 19:50 sm908361
A resistor and an inductor of negligible resistance are connected in series to an a. c. supply. The p. d. across the resistor is 20V and the p. d. across the inductor is 50V. Calculate the supply voltage and the phase angle betweenvoltage and current.
Answers: 1
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Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.
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Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero
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Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um
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The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object
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A resistor and an inductor of negligible resistance are connected in series to an a. c. supply. The...
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