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1. A 4-pole, 3-phase synchronous motor fed from 50-Hz mains is mechanically coupled to a 24-pole, 3-phase synchronous generator. At what speed will the set rotate? What is the frequency of the emf induced in the generator?
2. A 20-pole synchronous generator running at 300 rpm feeds a 6-pole induction motor which is loaded to run at a slip of 5%. Find the speed at which the induction motor runs and the frequency of the currents induced in its rotor.
Any causal signal x(t) having a Laplace transform with poles in the open-left s-plane (i.e., not including the j axis) has, as we saw before, a region of convergence that includes the j axis, and as such its Fourier transform can be found from its..
Locate the centroid of the cross section and determine the two principal moments of inertia. Resolve the load P into components parallel to the principal axes, equal to the shear forces. The two sets of shearing stresses are then calculated at loc..
A relay coil is connected to a 210-V, 50-Hz supply. If it has a resistance of 30 ohms and an inductor of 0.5 H: 1. The apparent power to the nearest VA is 2. The power factor to the nearest hundredth is
For the circuit below, when R1 = 1KΩ, R2= 2KΩ, RL = 4KΩ, and gm = 1 mA/V, what is the voltage gainvo/vsig ?
Discovering Roots Complex numbers expose all the roots of real (and complex) numbers. For example, there should be two square-roots, three cube-roots, etc. of any number. Find the following roots.
Determine the maximum output of the roll crusher in tons per hour for material less than 1 in.- What amount, in tons per hour, of the roll crusher output is in the range of 1 in. to 1 in.to and what amount is less than in.?
To obtain this energy, you build a large nuclear reactor that can supply one gigawatt of electric power. How many years will it take to generate that energy
For the case when five similar type load circuits are connected to the output, calculate the power dissipated in the circuit.
The microprocessor then reads the 8-bit data from the dip switch and puts the value in memory starting at location called ‘BUFFER' . This same data is sent to a digital-to-analog converter ( D/A) whose output drives a dc motor.
3)what is its frequency content 4) The 1D rect function has a width of 1; i.e. has a non-zero value between +1/2 and -1/2. What is the width of the delta function 5) What is the area of the delta function
Measurments taken of a square-wave signal using a frequency-selective voltmeter(called a spectrum analyzer) show its spectrum to contain adjacent components(spectral lines) at 98KHz and 126 KHz of amplitudes 63 mV and 49 mV
A president, secretary, and treasurer are to be chosen from a group of 10 senior members of the IEEE student chapter at the Citadel. Assume that each member cannot serve more than one position. How many different choices of officers are possible
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