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A wire of diameter 1 mm and conductivity 5*10^7 S/m has 10^29 electrons / m^3 when an electron field of 10 mV / m is applied. Determine charge density of free electrons, current density, and current in the wire.
Determine the conductor size for each motor tap, the motor controller size, overload rating, motor and controller disconnect rating, time-delay fuse rating, and motor branch circuit conductor size.
A 220 V, 1500 rpm, 11.6 A (armature current) separately excited motor is controlled by a single phase, full wave SCR converter. The armature resistance of the motor is 2 ohm. The ac source voltage is 230 V (rms) 60 Hz.
1. Find the volume of a frustum of a pyramid with square base of side 17, square top of side 9 and height 14.2. The base of a solid is a circular disk with radius3. Parallel cross sections perpendicular to the base are squares.
Solve y"+y'-2y=2x^2, y(0) = 0, y'(0) = 1 following these steps a) find homogeneous solution, b) find nonhomogeneous solution with method of undetermined coefficient with constants evaluated,
Given 30 nano-Coulombs point charge located at the origin of a rectangular coordinates system. a) Find the electric field intensity at a point located (3, 4, 8). b) Find the total electric flux enclosed by a sphere of radius p=8m
An industrial load consumes 88 kW at a power factor of 0.707 lagging from a 480 Vrms line. The transmission line resistance (Rline) from the power company's transformer to the plant is 0.08 Ohms.
design a 4th order Butterworth band-pass filter, using a low-pass filter followed by a high-pass filter, to extract the 1200Hz and 1500Hz components from the signal x(t) a. Determine the cut-off frequencies of the low-pass and the high-pass filters..
A coil with impedence 8+j6Ω is connected in series with a capacitive reactance X. The series combination is connected in parallel with a resistor R. given that the equivalent impedence of the resulting circuit is 5/_0'Ω, find the value of R and X.
Indicate what data type you would use for the following variables: (a) the temperature (b) the number of days in a week (c) the number of days in a year (d) the number of months in a year
Determine the transfer function for a first order low pass filter with a cutoff frequency of 1000 radians/sec (note radians and not Hertz) and a pass band gain of 1 using the following types. (a) Butterworth type
A 3kw, 120V, 2400 rpm shunt motor has an armature resistance of 0.4 ohms and a shunt field resistance of 160 ohms. The motor operates at full load. The no load current is 2A. If an external resistance of 2.5 ohms is insertions in the armature circ..
A student from electromechanical systems class planned to construct a transformer that will cause an actual load resistance of 98.5 ohms to appear as 172.8 ohms to an AC voltage source of 176 V rms.
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