moving coil instrument of resistance 10 ohms has a 50 division scale and indicates 1 micro ampere per division. How can this instrument be used to measure current up to 25 mA. How can this instrument be used to measure voltage up to 5 volts.

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Q: What minimum value of series resistance s required when three 10-watt, 10-volt, 1000-mA zener diodes…

A: From the Question What minimum value of series resistance is required when three 10-watt, 10-volt,…

Q: What minimum value of series resistance is required when three 10-watt, 10-volt, 1000-mA zener…

A: From the Question What minimum value of series resistance is required when three 10-watt, 10-volt,…

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Q: 2.2 kN +30 V Vin OV V out 12 V -30 V (a)

A:

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Q: For the circuit in figure #2, explain how it works and how JFET works on it

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Q: A DC voltmeter has a sensitivity of 1000 ohm/volt. When it measures half of full scale in 100 V…

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Q: Is it possible to detect maximum or peak AC voltage with an analog voltmeter?

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Q: What minimum value of series resistance is required when three 10-watt, 10-volt, 1000-mA zener…

A:

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A: 1) Given Vp = 20 V  Vavg = (20/π ) = 12.74 V  Hence the correct option is " a "

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Q: Based on Figure 1, the AC voltage input of the rectifier is 110 Vrms with 50 Hz frequency. The…

A: Given data: Vinrms=110 Vf=50 HzV0rms=85.7 VRL=50 Ω

Q: What minimum value of series resistance is required when three 10-watt, 10-volt, 1000-mA zener…

A:

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.