Find the current through each of the three resistors of the circuit shown below. The emf sources have negligible internal resistance. 20.0 V + www 2.00 Ω + 14.0 V 5.00 Ω 4.00 Ω 1 + 36.0 V

Q: 30 V | +1 2 ΚΩ 0.2 iΔ 2 ΚΩ 2 ΚΩ 5.6 ΚΩ a b

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Q: If the total power is 450 kW in a power measurement of a 3- Phase delta connected load by 1-…

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Q: 4. A 4-pole induction motor draws 25 A from a 50 Hz, 460 V, three phase line at power factor of 0.85…

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Q: V10 V20 +15V -15V +15V -15V 5kQ 1k2 5KQ 10kQ2 10kQ VO

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Q: 1. Find i(t) and Va(t) for t > 0. SOV 40 a to Та T | H eelle + VR (filt) 20a

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Q: 3. Please show the solution

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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.