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The armature of a shunt generator as a 0.05 ohms resistance. Each brush has effective resistance of 0.02 ohms. The terminal voltage is 100V while the current is 40A. What is the efficiency of the generator?
Given a three phase motor: 5 hp, 3515 rpm, 230V, 10A, efficiency = 75%; derive the per-pharse equivalent circuit of the motor.
An Agilent 33220A function generator is set-up to produce an output of v(t)=5+10sin(2 *100t) at the Output connector. a. Describe how you would increase the frequency to get an (open-circuit) output of 5+10sin(2 *2000t) volts
Find the noise temperature for a Cal-Amp C-Band 140105-1 low noise block down converters (LNB) for satellite TV. What is their equivalent series input resistance, and what implications does this have for the circuit design
It is desired to use a short-circuited section of a 60-O lossless line to synthesize an input reactance X = - 120 O. If the operating frequency is 1 GHz and the phase velocity on the line is 0.8
A long shunt cumulative compound motor is run at full load. It is rated 240 V, 10 A, 1200 rev/min. If Rf=180 ?, Ra=2 ?, Rs=1.22 ?, and the stray power losses are 160 W, find: a. The back EMF. b. The power rating.
Design a vending machine controller. The machines sells coke and pepsi. The cost is 25 cents, accepting dimes and nickels. When a dime is inserted the input D is asserted. When a nickel is inserted the input N is asserted.
1.5V battery. Design a voltage divider to provide a voltage that is approximately 1/3 of the battery voltage. Use resistances in the kilo ohms range. Redesign your divider so that the resistors are in Mega ohms range.
A somewhat discharged automotive battery has an open-curcuit voltage of 12.5 V and supplies 50 A when a 0.1 ohm resistance is connected across the battery terminals.
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.
An indecisive student contemplates whether he should stay home ortake his final exam, which is being held 2 miles away. Starting at home, the student travels half the distance to the exam venue before changing his mind.
When you get to work one day you see that the station is delivering 6.0 MW of power with a power factor cosf=0.9. What is rms current. How much capacitance you should add in series to bring the power factor to 1.0. How much power the station will b..
A 2400-115 V transformer has a sinusoidal flux expressed by φ =0.113 sin 188.5t. Determine the primary and secondary turns.
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