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A permanent magnet dc motor has two poles and a simplex lap winding of 18 loops and 3 turns per loop. The armature radius is 4 cm and the armature length is 15 cm. The flux density under the poles i
Write a program which accepts the frequency of an electromagnetic wave in megahertz and then displays to the user whether the frequency falls in the FM band, AM band, or neither.\FM radio falls betw
determining whether the number divided evenly can be accomplished by determining if there is a remainder. Implement the program using a for loop for the calculations. Additional hint: a break in the
Consider a continuous-time LTI system with frequency response of H(j omega) = 1 + j 250 omega/(2 - j 50 omega)2 Find the expression for the magnitude of H(j omega) and sketch its Bode plot (sketch asy
If a silicon diffusion is doped with phosphorus (donors) at a concentration of 1.0 x 10^16/cm^3, and has a sheet resistance of 365.7 ohm/cm^2 square, what is the thickness of the diffusion in micron
The excitation branch impedances are given referred to the high-voltage side of the transformer. a) Find the equivalent circuit of this transformer referred to the high-voltage side.
Recall that for discrete sequences the ts sample period (the time period between samples) is the reciprocal of the sample frequency fs. Write the equations, describing time-domain sequences for unit
The A/D converter has internal memory that can store up to 4x106 discrete samples. What is the maximum number of cycles of a 25 MHz analog sinewave that can be stored in the A/D converter's memory.
the bottom of the conduction band at one end of a silicon resistor is at the same energy level as the top of the valence band at the other end. What current flows through the resistor if the resista
Sketch a transistor-level schematic of F=(A+BC+DE)' and determine the relative sizing of all the transistors to equalize the rise/fall time.
Point A is at an electrostatic potential of +1V relative to point B in a vacumm. An electron initially at rest at B moves to A. What energy (in J and eV) does the electron have at A What is its velo
The continuous-time sinusoid x(t) = cos(300?t) is sampled every Ts = 2.0 ms, so that x[n] = x(0.002n) For what other values of f in the range 0 Hz to 2.0 KHz does the sinusoid v(t)
Compute the energy of the following signals: 1) x(t) = e^-(a|t|) for a > 0 (Notice the absolute value on t) 2) x(t) = (1 - |t|)rect(t/2) (Notice the absolute value on the first t)
A diode is connected in series with a 30-V rms source to charge a 12-V battery with an internal resistance of 0.1 ohm. Specify the series resistance necessary to limit the peak current to 2A. Estima
A charged paint is spread in a very thin uniform layer over the surface of a plastic sphere of diameter 13.5 cm, giving it a charge of -13.9 µC. (a) Find the magnitude of the electric field ju
A flat sheet of paper of area 0.150 m2 is oriented so that the normal to the sheet is at an angle of 65° to a uniform electric field of magnitude 29 N/C. (a) Find the magnitude of the electric f
Assume two cables have wire strands that are the same diameter and made of the same material. If one cable has 7 strands and another has 19 strands, which will have more resistance over a mile
A 100 V power supply has a series limmitin restor of 100 k ohms connected to its output. draw the norton equivalent cirtuit for the power supply. explain why the norton equivalent circuit you drew
A common energy consumption for a family is about 1000 kW hr / month. How much power would that be on the average. (Hint: Notice that hour and month are both units of time so kW hr per month is r
Design a circuit that takes a sinusoidal input of varying frequency at 1V amplitude and produces an output amplitude of approximately 1V when the frequency is 1 Hz and approximately 0.5V when the fr
Calculate the sag in a 90-yard span of a 0.035 -in^2 overhead line when covered with ice to a radial thickness of 5/8 in, in a wind that exerts a pressure of 9 lb/ft^2, assume the breaking load as 1
Assume the widths of the two sides of the junction are much greater than the respective minority-carrier diffusion length. Calculate the applied voltage at a forward current of 1 mA at 300K.
find the MIN permissible SAG for a span of 225 m using a copper conductor with 1.2 cm diameter and allowing a MAX conductor tension of 2200 kg/cm^2 . The horizontal wind pressure is 6 g/cm^2 and spe
An overhead line conductor is supported at water crossing from two towers, the heights of the supports being 30 and 34.2 m respectively , above the water level , with a horizontal span of 325 m.
An abrupt p-n junction has a doping concentration of 1015, 1016, or 1017 cm-3 on the lightly doped n-side and of 1019 cm-3 on the heavily doped p-side. Obtain series of curves of 1/C2 versus V, wher