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A star-connected 8 poles, 50 Hz, synchronous motor has synchronous reactance of 11 W per phase. On no-load, both the excitation and the terminal voltages are equal to 3.3 kV. Neglect all losses.
For a sudden disturbance in the shaft-load torque, the rotor falls back in space by one mechanical degree. Calculate the synchronising current, synchronising power and synchronising torque tending to restore the rotor to its previous position.
With gradual increase in the shaft load, the rotor slides back in space by one mechanical degree. Calculate the armature current. For an armature current of 30 A, find the angle in mechanical degrees, through which the rotor slips back.
In a typical mobile communications base station (or cell site), a radio frequency (RF) signal is amplified in the base station and then sent (over cable) to the antennas at the top of the tower.
A medium wave antenna mast is 50 m high and is operating at 1 MHz with a top loading the effective height is equal to 45 meters. with input power = 100 Kw , find the input current given that the ground resistance = 2.5 ohm .
Use Matlab to charge neutrality equation in order to plot the Fermi level as a function of doping vs. temperature for Si, GaAs, SiC, and GaN. Using Phosphorous as a donor dopant at 1e18, 1e16, 1e14, and 1e12 for each material above
the runner-up in a road race is given a reward that depends on the difference between his time and the winners time. he
My 9year old son is very interested in science and is working on aproject that involves hooking up a motion sensor (PIR) to a clock alarm. The challenge is to get the PIR to de-activate a sounding alarm.
A 3.0 μF capacitor is charged to 40 V and a 5.0 μF capacitor charged to 18 V are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 3.0 μF capacitor
Enter a design for a full adder in Logic Works/SimAid. Simulate it using Logic Works and make sure it works as it is supposed to. Turn in a print out of the circuit logic diagram and of the full-adder
What rate RTCP will limit its traffic to and how much RTCP bandwidth a particular sender will be allocated?
Question about Complex power, If an electrical load operates at 240 Vrms.The load absorbs an average power of 8kW with .8 lagging power factor
use nodal analysis to find io in the network given below. identify and label each node otherwise you will lose your
A rectangular waveform has a 50% duty cycle (high for 1/2 acycle and low for 1/2 a cycle). It goes between two voltage levelsof -3 V (low) and +8 V (high), and has a period of100μs. a. Determine the Average voltage of this waveform.
A plane wave is obliquelyincident on a perfectly conducting half-space. The magnetic field is perpendicular to the plane ofincidence. The incident E has an amplitude of1V/m,and the incident angle is θi. a. Write the fields in each region.
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