The air interface connecting phones, antennas, and towers in mobile networks is completely devoid of wires and cables. Is there anything else required for the backhaul of cellular signals?
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The air interface connecting phones, antennas, and towers in mobile networks is completely devoid of wires and cables. Is there anything else required for the backhaul of cellular signals?
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- The AM band extends from approximately 500 kHz to 1,600 kHz. If a 1.5-μH inductor is used in a tuning circuit for a radio, what are the extremes that a capacitor must reach in order to cover the complete band of frequencies? nF nF Cmax = Cmin =A certain solar cell type has an output capability of 0.5 A at 0.4Volts. A series / parallel solar array has been designed of such cells with 100 parallel strings and each string has 300 cells in series. Calculate : (i) Voltage capability (i) OCurrent capability and (ii) Power output capability of array tanTo tune in for the right frequency of a radio station, we may have to adjust a: Group of answer choices capacitor. battery. resistor. transformer
- The plate on the back of a personal computer says that it draws 6.15 A from a 120-V, 60-Hz line. For this computer, what is the current amplitude? answer asapIn situations where a small signal must travel over a distance,a shielded cable is used in which the signal wire is surrounded by an insulator and then enclosed by a cylindricalconductor (shield) carrying the return current. Why is a“shield” necessary?You have been called in as an expert witness in a civil case. The case involves a dispute between neighbors. The plaintiff neighbor is complaining about a buzzing noise during the night that prevents the plaintiff from sleeping. He claims that the buzzing is coming from a light fixture on the defendant’s porch ceiling. The defendant likes to do installations and repairs himself and has done a sloppy job of installing the light fixture. The fixture hangs vertically from a single wire that is attached through the porch ceiling and down the wall to one connector in a nearby electrical outlet. The second wire is hung horizontally with strings at the level of the light and then runs down the wall to the other connector in the outlet. The defendant leaves the light on all night long for security. Recalling his high school physics, the plaintiff states that the combination of the 60-Hz household voltage and the magnetic field of the Earth results in an oscillating driving force on the single…
- In the U.S., where the standard is 120 V, a particular light bulb has a power rating of 100 watts. What will be its true power output if it is used in Europe, where the standard is 220 V?Electric power is transferred over large distances at veryhigh voltages. Explain how the high voltage reduces powerlosses in the transmission lines.