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• What are three elements, other than the commonly used silicon and germanium, that are used as semiconductor material to construct transistors ? •Describe the properties of these elements that make them good semiconductors and include where they are located on the periodic table. • Why is doping material required in transistor construction, and what are the properties of doping material that make it a required element of transistor construction?
The field current of a 200kW, 230V shunt generator is 8A. When running full load at rated voltage. If the combined brush contact and armature resistance is 0.03 ohms. Determine the power generated and the electrical efficiency.
design a logic program that will track the activity for one turnstile. there will be three inputs PHASEA, B and RESET. there will be no output. the program should be able to track 999 total guests.
For a BJT common Emitter Amplifier, the AC base voltage = 1,2Vrms, Av=50, Bdc=150, Bac=200, alpha dc =0.98 and an RE of 500 ohm. What is the AC P-P voltage
a positive charge of magnitude q1 lies at the origin. derive an expression for the incremental work done in moving a
design a pulse-mode (Asynchronous, no clock) automatic vending machine. The candy bars inside the machine cost 25 cents. The machine accepts nickels, dimes and quarters. There is an electromechanical system that accepts the coins sequentially.
The current in a single-loop circuit is 5.0 A. When an additional resistance of 2.0 O is inserted in series, the current drops to 4.0 A. What was the resistance in the original circuit
Maximum value of frequency deviation is fixed at 75 kHz for commercial broadcasting by radio. Modulation frequency W = 15 kHz, then find the transmission bandwidth of signal and deviation ratio.
The steady-state response is due to simple poles in the j axis of the s-plane coming from the input. Suppose the transfer function of the system is: H(s)=Y(s)/X(s)= 1 / (s+1)^2 + 4 a. Find the poles and zeros of H(s) and plot them in the s-plane.
A radially dependent surface charge is distributed on an infinite flat sheet in the x-y plane and is characterized in cylindrical coordinates by surface density ps = p0/p, where p0 is a constant. Determine the electric field strength, E, everywher..
If R2 = 2R1, R3 = 3R1 and the total power taken by the circuit is 480 watts. Calculate the power in each resistor
Formulate the differential equation model for a motor having inductance L and rotational inertia J, and electrical resistance Rw and frictional resistance Rf, driving a frictional load, Rl.
For what range of values of a is the system stable?
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