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A permanent magnet DC motor has an armature circuit resistanceof Ra = 0.4Ω, a motorconstant KE = KT = 0.5 in MKS units, a motor intertiaof JM = 0.02Kgm2, and a maximum armaturecurrent I
Design a CE amplifier with gain of 10 using a 2N3906 transistor and a 20V power supply. Calculate the required resistor and capacitorvalues for the circuit, assuming a minimum frequency of 10 Hz.
A square in the x-y plane in free space has a point charge of+Q at corner (a/2, a/2), the same at corner (a/2, -a/2), and apoint charge of -Q at each of the other two corners. (A) Find the electrica
Describe the operation of the transmission gate. Consider the source and drain terminals of both the NMOS and PMOS devices. Why not use two NMOS devices Does it pass analog or digital signals
A coil of wire would around a toroid. The core has a length of 12.5 cm, a cross sectional area of 8cm2, and a relative permeability of 200. Calculate the equivalent reluctance of the core.
An ideal 3 phasemachine runs at 1800 RPM with a torque or 20 Nm. It is connected to a 220 V line-to-linesource and draws a current of 14 A. Determine the power factor and the per phase magnetizing r
To what voltage must the capacitor becharged. (One horsepower is equivalent to 745.7 watts.) Does this seem to be a practical method for storing this amount of energy. Do you think that an electric
Nine identical wires, each of diameter d and length L, areconnected in series. The combination has the same resistance as a single similar wireof length L but whose diameter is
A 65volt neon lamp is connected across a 8h coil with aresistance of 275. When the coil's field collapses, a 6k resisteris inserted into the circuit in series with the coil. The source is 25 volts D
Each limit switch has one normally open, NO, contact and onenormally closed, NC, contact. Two control relays, CR1 and CR2, areused in the gate control circuit. These relays have two NO contactsand t
A proton moving with a speed of (2*106)m/s through amagnetic field with a magnetic flux density of 2.5T experiences a magnetic force of magnitude4*10-13 N. What is the angle between the magnetic field
An electron moving in the positive x-direction perpendicular toa magnetic field experiences a deflection in the negative z-direction. What is the direction of the magnetic field
A power supply has five intermittent loads connected to it and eachload, when in operation, draws a power of 10W. Each load is inoperation only one-quarter of the time and operates independently of
Design an R-C filter which will pass only the fundumental frequnecy of f(t); show your circuit, the input, output,calculations and what is the circuit called.
The dielectric materials used in real capacitors are not perfect insulators. A resistance called a leakage resistance in parallel with the capacitance can model this imperfection. A 100-μF capaci
By using only two resistors singly, in series, or in parallel --you are able to obtain resistances of 6.0, 8.0, 24,and 32 . What are the two resistances
If we connect the two diodes from Problem 6 in parallel, andforce (using a constant current source) 500μA through them, what will the voltage be across each diode, and what will thecurrent be in
A Schottky diode and a p-n junction we are looking at (roomtemperature) both have cross-sectional areas of 5x10-4cm2. We find their reverse saturation currents are 30 nA/cm2 and 3 pA/cm2,respectively.
What is the transformer used for in a full wave rectifier Can you make a bridge rectifier without a transformer What are the advantages of using a transformer If you initially have a transformer
A Si sample contains 1016 cm-3 In acceptoratoms and a certain number of shallow donors. The In acceptorlevel is 0.16eV above Ev, and EF is 0.26eVabove Ev at 300K. How many (cm-3) In atoms are un-ion
A semiconductor device requires n-type material; it is to beoperated at 400K. Would Si doped with 1015atoms/cm3 of arsenic be useful in this application Could Ge doped with 1015cm-3 antimony beused
A Si sample is doped with 106cm-3 boron atomsand a certain number of shallow donors. The Fermi level is.36eV above Ei at 300K. What is the donor concentration Nd
Given a 4.0-nC charge on a 1.0 meter length of an inner cylindricalshell of radius a = 0.060 m, a -4.0-nC charge on a 1.0 meter lengthof an outer cylindrical shell of radius b = 0.077 m, & an&ep
Suppose a coaxial capacitor with inner radius 1.0 cm, outer radius2.0 cm and length 1.0m is constructed with two differentdielectrics. When oriented along the z-axis, εr for0o<= φ<
the bridge circuit is energized from a 21 V dc source. the bridge is balanced when R1 = 800Ω, R2 =1200Ω, and R3 = 600Ω. a) what is the value of Rx b) how much current(in milliamperes