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The single-phase power line of Prob. 4.6 is replaced by α three-phase line on a horizontal crossarm in the same position as that of the original single-phase line. Spacing of the conductors of the power line is D13 = 2D12 = 2D23, and equivalent equilateral spacing is 3 m. The telephone line remains in the position described in Prob. 4.6. If the current in the power line is 1 50 A, find the voltage per kilometer induced in the telephone line. Discuss the phase relation of the induced voltage with respect to the power-line current.
Prob. 4.6
The energy density (that is, the energy per unit volume) at a point in a magnetic field can be shown to be B2/2μ, where B is the flux density and μ is the permeability. Using this result and Eq. (4 .10), show that the total magnetic field energy stored within a unit length of sol id circular conductor carrying current I is given by μl2/16π. Neglect skin effect, and thus verify Eq. (4.1 5)
Consider a communications channel with a passband of 3 kHz to 27.4 kHz. A modem will be connected to this communications channel and the modem will operate with a signaling rate that is 0.56 the maximum allowable signaling rate for this communicat..
Determine the value of the constant c such that the following functions are valid probability functions: A. p(x) = cx/20, x = 1,2,3,4,5,6 and zero elswhere. B. p(x) = c(X^2 + 1), x = 1,2,3,4,5, and zero elsewhere.
Find the electric field intensity at (0,0,75000) produced by 50,000 0.1 C charges along the x-axis spaced at 1 meter apart starting at (1,0,0) and 50,000 0.2 C chargers along the y-axis spaced at 1 meter apart starting at (0,1,0).
The serial ports on two computers which use binary signaling are connected by a twisted pair cable. The cable has a flat frequency response up to 120KHz, with negligible group delay distortion. That is, the bandwidth of the cable is 120KHz.
Signal transduction refers to any process of changing one signal to signal of another type. An example would be a series of pulsing lights into the sound for the word: "Help". Discuss how this transduction could be done by a device.
magnetic field, B, is constant, supplied either by a constant field current or by permanent magnets. The input voltage to the armature of the motor,Vin , connects to a circuit containing the armature impedance, R and L in series, and a dependent v..
One of the home satellite services uses a dish antenna having a diameter of 18" (0.457 m) and frequency of 12.45 GHz. If the illumination efficiency is 70%, determine the gain of the antenna in dB
Calculate the length and the distance coved by the lightening arrestor to be installed above 20 feet height industrial building.
Paint manufacturer is studying two different paint formulas
Your task is to work in a group to prepare a report on: Description of the selected product or component Identification of the property requirements for the application
Convert the following differential equation 5 (t) +4 (t) +3x.(t) + 2x(t) + 7u(t) - 5u.(t) + 2 (t) = 0 to state space form. Is this system marginally stable, asymptotically stable, or unstable when u(t) = 0 Determine stability by using the state sp..
Design a 2-bit multiplier using 2-input AND gates along with 2-input OR gates and inverters. Hint: start with a truth table and keep in mind that there are four inputs and four outputs. The numbers to be multiplied can be represented
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