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1. An abrupt Si p-n junction has the following properties at 300K:p-side n-side units
Draw an equilibrium band diagram for this junction, including numerical values for the Fermi level position relative to the intrinsic level on each side of the junction. Find the contact potential from the diagram and compare with the analytical expression for.
Consider a hollow spherical conductor with total charge +5e. The outer and inner radii are a and b, respectively. (a) Calculate the charge on the sphere's inner and outer surfaces if a charge of -3e is placed at the center of the sphere.
A DC motor is driving a load given by TL = 3 + 0.02ωLNm , where ωL is the speed in rad/sec. The armature resistance of the motor, Ra = 2Ω . The machine constants at rated flux density, kE=kT=0.4 (inSIunits).
In one type of computer keyboard, each key holds a small metal plate that serves as one plate of a parallel-plate, air-filled capacitor. When the key is depressed, the plate separation decreases and the capacitance increases.
A time varying capacitor is characterized by the charge- voltage equation q(t) = C(t)v(t)
What are the benefits of high and medium voltage SF6-switchgear?
The voltage between two charged parallel plates is 5 volts (the top plate has more negative potential). What energy is acquired by an electron that is moved from the bottom plate up to the top plate
Voltage and current measurement taken for a 3- phase Wye- connected alternator indicate a line voltage of 208 V and a line current of 20 A. What is the value of the phase voltage and phase current
A batch process which involves filling a tank with liquid, mixing the liquid and draining the tank, is automated with a PLC. The specific sequence of events is as follows
How can you make a low-pass filter with proper cut-off frequency to remove noise from a voice transmission using frequency spectrum What frequency cutoff would you use in that
A linear time-invariant system has a transfer function with a direct-current gain equal to 2 and a phase angle of 45°. What is the response of this system to the input x(t) = 4 cos(2t)
What connectivity is required for both parties? Use your textbook and the Interne to research your answer. Which option would you suggest and why?
One of the machines which has a synchronous reactanceof 50% and a resistanceof 1% delivers a power output in kW equals to 70% of its rated kVA. If the mf of this unit equals 1.2 times the terminal voltage, find thepower factor at which the machine..
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