Material GAAIAS GaP Color Wavelength (nm) V-forward 1.8 Super Red Green 660 565 Red GAASP AllnGaP 645 646 Red Orange Yellow Amber AllnGaP 610 AllnGaP GAASP 590 605 2.1 Red Green Green Blue GaP 700 2.1 GaP 555 2.1 AllnGaP 574 2.2 SiC InGaN 430 3.5 Green 505 3.5 Blue InGaN 470 3.5 White INGAN 3.5 Green Green InGaN 525 3.7 InGaN 525 4 Blue SiC 430 4.5 N222333

Q: 1. How can you draw the spectrum of FM?

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Q: 3. How dose the bandwidth change in relation to increasing signal amplitude? FM

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Power Measurement

According to Blondel's theorem, the total power is measured with one less number of wattmeters than the number of wires present in the system. So, a single-phase and two-wire system will require one wattmeter and a single-phase and the three-wire system will require two wattmeters, and a three-phase and the three-wire system will also require two wattmeters and a three-phase and the four-wire system will require three wattmeter devices. The wattmeter is a device that measures power using one voltage and one current input as shown in the above figure. Multiple current or voltage input pair cables are used by many power analyzers and digital storage oscilloscopes (DSOs) for measuring watts, in effect within a single instrument acting as multiple wattmeters. It is possible to measure three-phase and four-wire power with one correctly specified power analyzer.