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An induction motor takes 350kW at 0.8 power factor lagging while driving a load. When an overexcited synchronous motor taking 150kW is connected in parallel with the induction motor, the overall power factor is improved to 0.95 lagging.
Determine the kVA rating of the synchronous motor.
An amplifier output is being evaluated by a technician. The output is found to be a sine wave. The measured time lapse from one sine-wave peak to the next is 5 milliseconds.
Determine the turns required in each phase of a star connected alternator operating on an 11 kV 50 Hz system if it has a flux per pole of 0.38 Wb, pitch factor of 0.95 and breadth factor of 0.98
A soccer player kicks a soccer ball of mass 0.45 kg that is initially at rest. The player's foot is in contact with the ball for 1.1 x 10-3 s, and the force of the kick is given by F(t) = [(6.1 x 105)t - (2.3 x 108)t2] N for 0 t 1.1 x 10-3s, where ..
The counter will use the falling edge of the clock (denoted by Clk) and have a separte reset pin (R) which will reset the counnter to 0000 when it is low (e.g. R=0). Please use D type flip-flops. write down the state diagram , and state table.
If non-ideal interface trap density of Dit = 5x1010/cm2/eV is to be considered, what is the shift in the flat band voltage. Assuming all interface traps are acceptor-like (negatively charged if filled with an electron and neutral if empty)
Rate at which succesful packets arrive at network node, After traversing a wireless filled channel packets arrive at a networks node according to a Poisson process with rate Lambda
A load Z draws 12 kVA at a power factor of 0.856 lagging from a 120-V rms sinusoidal source. Calculate (a) the average and reactive powers delivered to the load, (b) the peak current, and (c) the load impedance.
Find the propagation delay for a minimum-size inverter for which Kn' = 3 Kp' = 180 uA/V^2 , and (W/L)n = (W/L)p = 0.75 um/0.5 um , VDD = 3.3 V , Vtn = -Vtp = 0.7 V, and the capacitance is roughly 2
Design an RC low-pass filter with a cutoff frequency at 2kHz, using a capacitor of \(0.1\mu F\) A. Show a circuit diagram and your calculations in obtaining R B. Make as sketch of the absolute value of the input impedence
Calculate the inductive reactance per meter of a single-phase, 50-Hz, two-wire transmission line. Assume each conductor's radius is 9cm and the distance between the two conductors is 5m.
Construct a table showing the current for values of time between 0 and 9 hours at intervals of 1 hour.Hence draw a graph of i against t for 0 is smaller or equal to t is smaller or equal 9.(cannot type in proper inequality symbols)
Consider the best possible heat engine working in air at 25°C. The engine continuously converts heat from a source at 300°C to work, and heat is continuously transferred into the engine at a rate of 100 kJ/s.
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