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The cross section of an infinitely long rectangular trough is shown in Fig. 6.38; develop a program using FEM to find the potential at the center of the cross section. Take ?r = 4.5.
Select a jaw crusher for primary crushing and a roll crusher for secondary crushing to produce 200 tph of limestone rock, -Specify the size and setting for each crusher selected.
A particular intrinsic semiconductor has a resistivity of 50 -cm at T=300 K and 5 - cm at T=330 K. Neglecting the change in mobility and effective density of states with temperature, determine the bandgap energy of the semiconductor.
The location of the zeroes in the spectrum suddenly changes to 5 kHz, 10 kHz, 15 kHz.... What parameter of the rectangular pulses has changed and what is its new value?
A tollgate (vending machine) controller accepts only nickels (5c), dimes (10c), and quarts (25c), and generates control signal to actuate the lever to open the tollgate (or dispense a chosen item in case of vending machine) once 35c or more are re..
A 500-turn coil is wound on an iron core. When a 120-V-rms 60-Hz voltage is applied to the coil, the current is 1 A rms. Neglect the resistance of the coil. Determine the reluctance of the core. Given that the cross sectional area of the core is ..
Convert the following differential equation 5 (t) +4 (t) +3x.(t) + 2x(t) + 7u(t) - 5u.(t) + 2 (t) = 0 to state space form. Is this system marginally stable, asymptotically stable, or unstable when u(t) = 0 Determine stability by using the state sp..
In an RC circuit the voltage is given by V=V0ekt where V0 is the initial voltage and K is a constant. Find out the current through the circuit as a function of time and capacitance.
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
The resistivity of copper is 1.724 micro-ohm-cm at200C. Determine for copper at 200C the resistance (a) of a cylindrical conductor 1 meter long and having a diameter of 1mm; (b) a rod 2 meters long and having a diameter of 2mm.
A hollow aluminum sphere, with an electrical heater in the center, is used in tests to determine the thermal conductivity of insulating materials.
Figure 9.45 shows a programmed PAL device using fuse-based interconnects.
Find the Thevenin and Norton equivalent circuits for the circuit. Find the maximum power that this circuit can deliver to a load if the load can have any complex impedance. Repeat if the load must be purely resistive.
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