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An arrangement for direct conversion of thermal energy to electrical power is shown. The inner cylinder of diameter Di = 25 mm is heated internally by a combustion process that brings the ceramic cylinder (ei = 0.9) to a surface temperature of Ti = 1675°C. The outer cylinder of diameter Do = 0.38 m consists of a semiconductor material (e o = 0.5) that converts absorbed incident irradiation to electrical current; the backing material for the semiconductor is a highly conducting metal that is water cooled to 20°C. The converter is assumed to be very long compared to the outer diameter. The space between the two concentric cylinders is evacuated. Assuming diffuse, gray surfaces, determine the heat transfer rate per unit area of the outer cylinder. The electrical output of the semiconductor surface is 10% of the absorbed irradiation in the wavelength region 0.6 to 2.0µm. For the prescribed conditions, determine the power generation in watts per unit of outer surface area.
A proportional controller for a rotating antenna has a gain Kp of 5 in-oz/deg. The antenna was initially pointing due south, but was then commanded to point southeast. What is the torque when the antenna gets to within 5o
The voltage across a certain load is V = 1200√2
On a spacecraft two engines fire for a time of 541 s. One gives the craft an acceleration in the x direction of ax = 4.90 m/s2, while the other produces an acceleration in the y direction of ay = 7.60 m/s2.
Common radio uses two modulation schemes - they are AM and FM.Explain very briefly what the FM scheme is. How does itdiffer from AM What are the advantages of each scheme
The sampling frequency in a DSP system is fs=8 kHz. Anti-aliasing filter used in the system is the second-order Butterworth filter with cutoff frequency of fc=3.4 kHz. What is the percentage of aliasing level at the frequency f=2.5 kHz
Create a schematic for a BJT amplifier using the 2n3904 amplifier. Build an amplifier from 100 Hz to 20 khZ witha gain of at least 100. Input should be 10 mV p-p
project on lfc using tuned fopid. i have considered a two area model. need help regarding implementation of ga matlab
(a) Write down a differential equation modeling the current I(t) (b) Assume that V=0 and I(0)=Io. Find the solution to the differential equation in part a. (c) Assume that V>0 is a constant and I(0)=0. This corresponds to adding a switch to the circu..
Use Gauss's law to obtainexpressions for the electric field intensity E in both regions: r> a and r
determine the corediameter required for the fiber topermit its operation over the wavelength range 1.48 to 1.60um. calculate the new fiber core diameter to enable single mode transmission at a wave length of 1.30um.
If we want to receive an FM station that broadcast on frequency = 100 MHz and we have to build a tunning circuit of LC utilizing a capacitor of 10pF. Design an inductor L to make tune by using your plastic Pin as a core for widing
A water tank, 22 ft in diameter, is made from steel plates that are ½ in. thick. Find the maximum height to which the tank may be filled if the circumferential stress is limited to 6000 psi. The specific weight of water is 62.4 lb/ft.
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