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Questions
a) Calculate the critical clearing angle?
b) Plot the swing curve for the machine
c) Find the critical clearing time in ms.
d) If the circuit breaker operates within 70ms is this sufficient to ensure stability is not lost?
Explain the operation of sequential logic devices and evaluate the output waveform in relation to the clock for QA, QB and QC in the subsequent circuit and show the binary sequence represented by these waveforms
An electron is confined inside a potential well with infinite walls. The width of the of the wells = 5nm. What is the probability of finding a electron within 1nm from either wall if the electron is at: A)the lowest energy level B). the 2nd lowest ..
An integral controller is used for speed control with a setpoint of 12 rpm within a range of 10 to 15 rpm. The controlleroutput is 22% initially. The constant KI = -0.15% controller output per second per percentage error.
an office with several work stations has an effective area of 527 sqft (49 meters). it has decorative incandescent lighting. The lamps are 40 watt yielding an out put of 18 lm/W. An illumination of 645 lux is required for the work stations.
Two small plastic spheres are given positive electrical charges. When they are a distance of 15.6{\rm cm} apart, the repulsive force between them has a magnitude of 0.235{\rm N} .What is the charge on each sphere if the two charges are equal
Determine the primary current when rated current in the 230 volt winding is at unity power factor and the rated current in the 575 volt winding is at .5 pf lagging. Neglect all leakage impedance drops and magnetizing current.
Finite Difference Time Domain (FDTD) numerical method to develop for me a software program that simulates - evaluates Specific Absorption Rate (SAR) Distribution in a Human Head Near a Mobile Cellular Phone as a student project.
Design a 25 W Class B public address amplifier with one input that will operate off of a pair of batteries of equal voltages and provide a voltage gain of 100. Assume that available op amps have againbandwidth product of 1 MHz and can come within ..
A 1.5 kW heater and a 5 hp induction motor are operated from a 208V, three-phase supply. The motor has a full load efficiency of 80% and a full load power factor of 0.85. What is the motor current and what is the total supply current
Design, a simple RLCcircuit which can be used to display both an underdamped andoverdamped natural response. The circuit design and componentvalues are up to you. The key is to keep it simple - asimple circuit, and a simple adjustment
Electrons and holes are moving in a uniform, one-dimensional electric field E = +2500 V/cm. The electrons and holes have mobilities of 700 and 250 cm2/V · s,respectively. What are the electron and hole velocities If n =1017/cm3 and p =103/cm3
Three single-phase transformers rated at 15kVA, 480V/120V,60Hz are connected in delta to function as autotransformers on a 600V,3-phase line. The H1,H2,X1,X2 polarity marks appear on the metal housing.
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