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A 20-hp 240-V 76-A 900 r/min series motor has a field winding of 33 turns per pole. Its armature resistance is 0.09 W, and its field resistance is 0.06 W. The magnetization curve expressed in terms of magnetomotive force versus EA at 900 r/min is given by the following table:
Armature reaction is negligible in this machine.
(a) Compute the motor's torque, speed, and output power at 33, 67, 100, and 133 percent of full-load armature current. (Neglect rotational losses.)
(b) Plot the terminal characteristic of this machine.
The total charge accumulated by a certain device is given by as a function of timeby q=18t2-2t4 ( in SI units). What is the max charge in the interval 0
Caffeine is a well-known beverage in both coffee and cola and has been shown to cause short-term increases in blood pressure. The article reported that drinking coffee doesn't seem to cause long-term high blood pressure. Can such a cause-and-effec..
Hope invested $11,400 in a mutual fund at a time when the price per share was $47.00. The fund has a load fee of $416. As a result, she purchased 234 shares in the mutual fund
Determine Firing angle α - the power fed back to the supply, and supply power factor and the DC machine is operated in regenerative braking mode at 1000rpm and rated motor current.
what is the maximum number of carrier frequencies that would ever be needed so that any arbitrarily partitioned region would never have two adjoining cells that use the same frequency
Design an 8 bit twos complement generator
1. Electrocardiogram (ECG) is a recording of the electrical activity of the heart which is clinically utilized to monitor patients and diagnosis life threatening cardiac arrhythmias [1]. See Figure 1. Remote monitoring in a patient'shome or office..
Design a MOS differential amplifier to operate from +/- 1V power supplies and dissipate no more than 2 mW in the equilibrium state. The differential voltage gain Ad is to be 5 V/V and the output common-mode dc voltage is to be 0.5 V.
If the telephone instrument has a resistance of 200 ohms when off hook and represents an open circuit when on hook calculate the combined resistance of the local loop and the power source at the central office.
What functions must the communications stations perform? Repeat for ring and star.
1. Draw a circuit that can scale the voltage from the range of 0~200 mV to the range of 0 ~ 10V. 2. Draw a circuit that can scale the voltage from the range of -200 mV ~0 V to the range of 0 ~ 10V . 3. Draw a circuit that can scale the voltage from t..
Using the time independent one dimensional Schrodinger equation, find the expression of the allowed energy levels for an electron in infinite potential well of width Δz= L (i.e. solve the differential equation and apply B.C. to obtain En)
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