unknown resistance of a resistor R4. The values of R1, R2 and R3 are 100 Q, 250 and 400 respectively. Then, the value of R4 is calculated as, A DC Wheatstone bridge shown in figure Q20 fed by a battery of Vs = 30V, it is used to measure the value of the R, No 31

Q: In the following figure, Vs=9V, R1=100 Q, R2=200 Q, and R3=300 Q. What is the equivalent resistance…

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Q: Example: 1.18 A basic d' Arsonval meter movement with an internal resistance R,,=1002 and a full…

A: Solution !!

Q: Find the current that passes through the 12 resistor. A D 352 www 6V E www F 192 www 292 392 www 9V…

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Q: 1. Thevenin Equivalent Circuit The following circuit will be examined during this experiment. A B R,…

A: Thevenin's resistance RTH can be obtained by short circuiting the terminals of voltage sources, Now…

Q: 30. If output voltage measurement V, = VA - Vgof the Wheatstone bridge circuit is equal to -0.365…

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Q: Two Resistances of R₁ = 60 ± 2.5% and R₂ = 129 + 3% are connected in Parallel. What would be the…

A: It is given that:

Q: Multiple  Choice Given two batteries: one with voltage V and internal resistance r1; another with…

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Q: For the circuit in the figure, find the following:(a) Equivalent strength(b) The current supplied by…

A: R1, R2 and Voltage source are connected in parallel  a)Equivalent strength= equivalent resistance=…

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.