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A dc motor takes an armature current of 105 A at 480 V when running at 720 rpm . The resistance of the armature circuits is 0.2 Ω and the field resistance is 96 Ω what is the torque developed in the armature?
Turbines at the Conowingo plant on the Susquehanna River each develop 54,000 hp at 82 RPM under a head of 89 feet. What is the turbine type Estimate flow rate of each turbine.
You are evaluating the feasibility of adding an injection molder to fabricate plastic sporks (everybody’s favorite harmless utensil) for the US Facility for the Criminally Insane. An injection molder will cost $1,200,000 installed.
A micrometer caliper is used to measure the diameter of a bolt and a reading of 0.768 inches is obtained. Based on this measurement, find the smallest possible diameter and the largest possible diameter.
the Mars Rover Spirit got stuck in the Martian sand. The wheels kept slipping. Attempts to free it were futile. Discuss the type of actuator in this case. Can you suggest any improvements in the actuator that would have prevented this unfortunate ..
A selective-repeat (SR) data link layer protocol uses 4 sequence bits to number it's frames. The source, C starts from frame 0 and proceeds following the Sr protocol. Let us start analyzing the frame/ACK transmissions when the first outstanding fr..
A. Two machinery options are described below. Calcuate the present value of each of the items specified. Assume an interest rate of 6% and a useful life of 8 years. Show all the necesary work to calcualte value.
A copper stripline transmission line is to be designed for a 592 OHMS characteristic impedance. The ground plane separation is 1.02 mm and the dielectric constant is 2.20, with tan = 0.001.
An LVDT is used in an accelerometer to measure seismic-mass displacement. The LVDT and signal-conditioning output is 0.31mV/mm with +/-2cm maximum core displacement.
1. The net charge through a cross section of a circuit element is given by q(t)=2t+t^2 C. As usual, t is in seconds. Find the current through the element in amperes. 2. the current through a given circuit element is given by i(t)=2e^-t A. As usual..
A 230kVA, 2300/230V, 60 Hz, step-down transformer has the following parameters. RH =1.2-ohm, XH =3-ohm, RL =12m-ohm, XL =30m-ohm, Rh+c=2k-ohm, , Xm =1.8k-ohm. If the transformer operates at half load with unity power factor
Assume that the I bit for external hardware interrupt IRQ is enabled and is low-level triggered. Explain how this interrupt works when it is activated. How can we make sure that a single interrupt is not interpreted as multiple interrupts
What is the data rate of a digital electrical communication system that uses 16 voltage levels to carry multiple bits with one voltage level, where each voltage level is kept at that level for a duration of 2 ms
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