3 E1 30V Μ R1 1kΩ - 1 E2 12V R2 2.2ΚΩ 2 R3 3.3ΚΩ

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Q: 7) (−3+12i)(−6-3i)= 8) 9) 1+2i -6-31 3+ 2i -6-31

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Q: 9.31 (Spectra) Sketch the spectra of the following signals. (d) r(t) = cos(πt)rect(t)

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Q: 5. Given the bit pattern 0110, encode this data using ASK, BFSK, BPSK. ASK BFSK BPSK 0 1 1 1 1 1 1 1…

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Q: ig ( ↑ R 1000 Ω m 160 nF 100 mH For the circuit shown above, what is the average power supplied by…

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Q: The bus admittance matrix of a power system is given by -j50 j10 j10 j5 j5 -j30 j10 j10 -j25 The…

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Q: Exercise 7: The frequency response of this filter is x[n] If the input signal is FIR FILTER H (6)…

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Q: The circuit in Fig. 5.79 is for a difference amplifier. Find vo given that v1 = 1 V and v2 = 2 V.

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Q: D 11 8 A 00 R1 4Ω 12 4A R2 4 Ω ww R3 4 Ω

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Q: W(s) = = 10(s + 1). s(s− 1) ' B;

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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.