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design a DC power supply with an ouput voltage of 12 v from an Ac source of120 v rms and 60 HZ. the rms ripple voltage should be limited to10% of the DC output. use a load resistance of 10 KΩ
annual income from a rental property is expected to start at $1300 per year and decrease at a uniform amount of $50 each year after the first year for the 15-year expected life of the property. the investment cost is $8000 and "i" is 9% per year.
Define X and Y to be two discrete random variables whose joint probability mass function is given as follows: P(X = m, Y = n) = e^7*4^m*3^n?m / m!(n m)! , for m = 0, 1, . . . , n and n = 0, 1, 2, . . . , while P(X = m, Y = n) = 0
an amplifier with an input resistance 10kohm, when drieven by current source 1microA and a source resistance 100kohm has a short circuit output current of 10mA and an open circuit voltage of 10 V. The device is driving a 4kohm load.
Find the electron and hole concentrations, mobilities, and resistivities of silicon samples at 300K with an impurity concentration of (a) 5X10^15 boron atoms and (b) 2X10^16 boron atoms and a.5X10^16 arsenic atoms.
In a CDMA system, user A transmits using the Walsh code (-1 1 -1 1 -1 1 -1 1) and user B transmits using the Walsh code (-1 -1 11 -1 -1 1 1), respectively. Show the output at the receiver if A transmits a data bit 0 and B transmits a data bit 0.
Assume that a stuck-at-1 fault occurs at the output of the circuit ((A+B)(B+C))'. Determine the test pattern that detects the fault. Repeat for a stuck-at-0 fault at the output.
Consider a system in which a data transfer over a bus takes 500 ns. Transfer of bus control in either direction, from processor to I/O device or vice versa, takes 250 ns. One of the I/O devices has a data transfer rate of 50 KB/s and employs DMA.
Suppose you are driving inside a tunnel. Assume that each of the two tunnels is 22ft wide and 13.5 ft tall. 1. Can you receive an AM radio signal in an automobile 2. Also determine weather FM signals can be received inside the tunnel.
A calibrated RTD a = 0.0041/°C, R=306.5-ohm at 20°C, and PD= 30mW/ °C will be used to measure a critical reaction temperature. Temperature must be measured between 50 °C and 100 °C with a resolution of at least 0.1°C.
1.2MW wind turbine has rotor diameter 64 m. Turbine operates in area with average wind veocity=7.5m/s with air density = 1.18kg / m^3. Turbine power coeff. including unit efficiency = 42.8 % Determine power output and the annual energy produced
A 20-hp, 250 V shunt-DC motor has an armature circuit of 0.22 ohms and a field resistance of 170 ohms . At a low-load, the speed is 1200 rpm and the armature current is 3 A. At full-load, the current is 55 A, and the flux is reduced by 6%
Find the sample space for the following experiment: Drawing bolts from a lot of 20, containing one defective D, until D is drawn, one at a time and assuming sampling without replacement, that is, bolts drawn are not returned to the lot.
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