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Four 1/2 W resistors are in series: 49-ohm , 64-ohm,109-ohm , and 125-ohm . To what maximum value can the current be raised before the power rating ofone of the resistors is exceeded? Which resistor will burn outfirst if the current is increased above the maximum?
A three phase ac machine with sinusoidally distributed windings has a 3-phase inductance, Lm = 40 mH . Balanced three phase voltages are applied to the stator with line-line voltage,VLL = 208V ( RMS ) , at 50 Hz.
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
A certain 15 V dry-cell battery, completely discharged, requires a current of 100 mA for 3 hr to completely recharge. What is the energy storage capacity of the battery, assuming the voltage does not depend on its charge status
Determine the transfer function for a first order HIGH filter with a cutoff frequency of 1000 radians per second and passband gain of 1 using Chebyshev type with 1-dB ripples on the passband.
for the circuit where Vr=30 Ohms, L=20 mH, C=39uF, and e=squareroot of 2(20)sin(1000t+40 degrees) a. Determine I, Vr, and Vc in phasor form b. Calculate the total power factor and indicate whether it is leading or lagging
Measurements taken on various resistors are shown below. For each, calculate the power dissipated in the resistor and the power rating necessary for safe operation using standard components with power ratings of 1/8 W, 1/4 W, 1/2 W, 1 W, or 2 W
Two pointcharges, Q1 and Q2,are located at (1,2,0) and (2,0,0) respectively. Find the relation between the valuesofQ1 and Q2 suchthat the total force on a test charge atpoint P = (-1, 1, 0) has (a)no x-component, or (b)no y-component.
If the balloon has a diameter of 12 m and carries two people, 85 Kg each, determine the acceleration of the balloon when it is first released. Assume the density of air is p= 1.16 kg/m^3, and neglect the weight of the ropes and the cage.
Input resistance Rin=20K When fed from a signal source with a peak amplitude of 0.1v and a source resistance of 20k , the peak amplitude v(pi)is 5mv. specify Re and bias current Ic. The BJT has beta =100.
The output of the power supply should be a 5 Vdc with no more the 5 mV peak-peak ripple. 3) The output must be galvanically (transformer) isolated from the input, but NO 60 Hz transformers are to be used. 4) The load can be assumed purely resistiv..
Design a low pass active filter such that its roll off attenuates frequency components a 10kHz or more by more than 30 db. This means that the magnitude of the transfer function (in db) at frequency 10kHz should be -30db or less
A synchronous generator rated 1350 MVA at 0.9 pf, 22.5-kV, Xs=11.6% is connected to a power system through a 1500 MVA, 7.9% 24-kV/230-kV generator step up transformer. The power is generated into a 230-kV system.
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