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A 1900x10^(-6)F capacitor, intially cahrged to 120V, is discharged by a steady state of 120x10^(-6)A how long does it take to discharge the capacitor to 0V
The voltage across a 1x10^(-6)F capacitor is given by v(t)=100e^(-100t) in which time t is in seconds. 1. find an expression for the current 2. find an expression for the power 3. find an expression f
An 8mm thick brass [E=83 GPa; v = 0.33] plate is subjected to biaxial stress with sigma x = 180 MPa and sigma y = 65 MPa. The plate dimensions are b = 350 mm and h = 175 mm.
A metal plate is subjected to tensile stresses of sigma x = 21 ksi and sigma y = 17 ksi. The corresponding strains measured in the plate are Ex=920 µE and Ey=620µE. De
(1) check a diode out with a regular ohm meter (2) Give an example of where a half wave, full wave or bridge rectifier is used. (3) What sizes of transformers are used for power lines
A three phase generator is connected to a three phase load via a step up three phase transformer, a short three phase transmission line and a step down three phase transformer.
A. Two machinery options are described below. Calcuate the present value of each of the items specified. Assume an interest rate of 6% and a useful life of 8 years. Show all the necesary work to cal
An assembly line can produce 90 units per hr. The line hrly cost is $4500 on stright line ( the first 8 hrs). Workers are guaranteed a minimum of 6 hrs. There is a 50% premiun for overtime (time and
The normalized lowpass filter with a cutoff frequency of 1 rad/sec is given as Hp(s) 1/s+1 a. Use Hp(s) and the BLT to obtain an corresponding IIR digital high passs filter with a cutoff of 30 Hz, a
a certain radio frequency generator delivers a power level of 12 dBm. If this signal is amplified, calculate how many decibels of gain is required to produce a power of 20 dBm.
Use z transforms to find the ZIR yZI(k), the ZSR yZS(k), and the complete response y(k) for each system. (E+0.5){y(k)} = 0, y(0) = 0. (E2-3E+2){y(k)} = us(k), y(0) = 2, y(1) = 0. (us(k) = unit step se
4 resistors are connected in electrical parallel. R1=2 OHM, R2= 4 OHM, R3= 6 OHM, R4= 8 OHM. if this parallel resistor combination is placed across an ideal current source = 3A.
The value of the element in the first column is the number of the row. The rest of the elements are equal to the sum of the element above them and the element to the left. When executed, the program
A temperature sensor measures from -44 f to 212 F with an output of 0-5 v. If an 8 bit ADC is used, what is the converter output for a temperature of 25 F
Bit 4 of Port B is connected to a switch that normally outputs a zero. Monitor this switch to detect a change from zero to one. Immediately when it becomes one, call a function to toggle Bit 5 of Po
What is the function of the enable control input of a tri-state buffer If the output of two or more tri-state buffers is connected to each other, what is the restriction on enable control input line
A p-n junction is made by doping Silicon with donors and acceptors. The doping at the p side has a uniform density of NA, but the doping density at the n side is not uniform and changes linearly wit
Construct a 4-to-16-line decoder with five 2-to-4-line decoders (74LS139A). Use a block diagram for components and clearly show your address select variables.
The collector current was measured for different values of load resistance. It was noticed that the collector current was pretty much constant for the first 1900 ohms and then it fell drastically.
In spherical Coordinates the potential of a dipole lacated at the origin is given by: a) use \(E = -grad \phi\) and the above to calculate E for a dipole located in free space.
Consider the first-order linear differential equation y(t) + 5 (dy(t) / dt) = x(t) Compute the zero-input response (general solution of the homogeneous equation) to find the system-specific part of t
A 230kVA, 2300/230V, 60 Hz, step-down transformer has the following parameters. RH =1.2-ohm, XH =3-ohm, RL =12m-ohm, XL =30m-ohm, Rh+c=2k-ohm, , Xm =1.8k-ohm. If the transformer operates at half loa
a. Convert all the per unit values to a common kVA of 100 and transmission side voltage base of 2500V b. To maintain one per unit voltage at rated load, find the per unit generator voltage needed.
Suppose you have a 2 kW electric heater rated for 220 volt operation, which you intend to operate at a reduced power dissipation of 1kW. Calculate the proper amount of voltage you would need to achi
define hue (h) in the h-i-s coordinate system. outline how the formula for computation of hue from R-G-B coordinates of a color point may be derived (detailed derivation is not required)