A 0.9 mA meter movement with an internal resistance of 90 Ω is to be converted into an ammeter. Its shunt resistance is 1.7 Ω Calculate the value of shunt current (in A).

Q: voltmeter consists of meter movement in series with high resistance

A: In this question we will write about voltmeter consists of meter movement in series with high…

Q: A 0 to 300 V voltmeter has an error of 2% of the full-scale deflection. If the true voltage is 30 V,…

A: Given: % Error at full scale = 2 % Full scale value of the voltage = 300 V True value = 30 V

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A: The solution is given below

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A: Given data, Zero drift Zr=-2.5 V. Measured value Vm=100 V.

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A: Given  If a voltmeter is used to measure 5V six times and the readings were as follows: 4.5V  4.5V…

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A: Here,full scale value = 200 V.Guaranteed accuracy at full scale = 1 %The voltage measured or reading…

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Q: In the figure below, explain in what situation ammeter A reading will be nonzero.

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Q: The value of a shunt resistance required to convert an ammeter of 1 mA with 100 Q internal…

A: we need to find out value of shunt resistance.

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Q: What is the current lo in the figure if Is = 70? %3D Is 2A 4A

A: All currents at the junction Incoming = outgoing  So use that technique Here 2 and 4 entering  70…

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Q: An ammeter has a resistance of 50 Q and requires 10 mA for full scale deflection. The shunt…

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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.