Consider the circuit shown in the figure(Figure 1). The ac generator in this circuit has an rms voltage of 70 V. Given that R 17 2 and L = 0.22 mH. Find the rms current in this circuit in the limit of high frequency. Express your answer using two significant figures. Irms= 4.1 A Submit ✓ Correct Correct answer is shown. Your answer 4.12 A was either rounded differently or of significant figures than required for this part. Important: If you use this answer in later parts, use the full unrounded value in Part B Previous Answers Find the rms current in this circuit in the limit of low frequency. Express your answer using two significant figures. 15. ΑΣΦ Irms = Submit Previous Answers Request Answer ? A

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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.