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In the "far field" region, show that the electric field intensity of a linear electric quadrupole decays much faster in space than 1/R3 for the electric field intensity produced by an electric dipole and 1/R2 for an electric monopole.
In a balanced three-phase system the Y-connected impedances are 3∠60°Ω. If V_bc=480∠-75° V, find current of phase "b" in polar form.
The rate of production of ATP in the cell is about 10 million molecules per second. The steady-state number of ATP molecules in the human body is about 0.1 mol. The number of cells of a human body is approximately 1014.
Consider LTI system described by input-out relationship below y(t)=u(t) times integral(from minus infinity to t) (x(tau)) d(tau) a) Determine impulse response ,h(t), of the system without using Fourier and Laplace transform tools.
A lossless transmission line with a characteristic impedance of 75 ohms is terminated by a load of 120 ohms. The length of line is 1.25 lamda. If the line is energized by a source of 100 V (rms) with an internal impedance of 50 ohms
A circle touches the x axis and also touches another fixed circle with center (0,3) and radius = 2 units. What is the locus of the center of the (first) circle
1. Calculate the total (composite) load power factor, true power, reactive power and apparent power. 2. Also calculate the full-load current and the amount of capacitive KVAR needed to bring the overall power factor to .95 lagging.
consider a running motor with Z = 6 + j7 ohm A) calculate the line crurrent if the motor is operated at 120 VAC RMS B) calculate the required paralell capacitor value to reduce the line current to a minimum
How does a transistor switch compare to a mechanical switch In other words, a mechanical switch when it is ON has a zer impedance. What about the transistor switch
looking for a brief theory on touch voltage, step voltage and ground potential rise (GPR). Should include graphical representation and relevant equations to help in understanding.
An infinite grounded conducting tube of radius 10cm is centered on the z axis. A concentric charged tube of radius 6 cm has a surface charge density of 24 uC/m2. A 1m long section of the charged tube is compressed to change its radius to 3 cm.
Ethree-phase, 5 hp, 208 V, 60 Hz induction motor runs at 1746 rpm when it delivers rated output power. (a) Determine the number of poles of the machine. (b) Determine the slip at full load. (c) Determine the frequency of the rotor current.
A computer employs RAM chips of 256 x 8and ROM chips of 1024 x 8. The computer system needs 2K bytes of RAM, 4K bytes of ROM, and four interface units, each with four registers. A memory-mapped I/0 configuration is used.
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