how do you measure electrical energy with the help of a wattmeter and a stopwatch?
Answers
Answer:
Main Answer:
The measurement's uncertainty is, however, 1 millisecond as well because the stopwatch's readout is constrained to 1 millisecond.
Explanation:
A wattmeter measures power in what ways?
A line-to-line voltage between two of the three power source lines is measured by each wattmeter. The algebraic sum of the two wattmeter values in this combination yields a correct reading of the total power, or watts. Direct connections to a 3P3W system can be used to measure power using the two-wattmeter technique. Pt = P1 + P2 A wattmeter is a device that measures power utilizing one current input and one voltage input in this context. Therefore, the best accuracy that can be achieved is +/- 1 millisecond while monitoring a 30 second interval (for which the accuracy is theoretically 30/86.4 milliseconds or 0.35 milliseconds).
The voltage and current the wattmeter measures in a single-phase, two-wire system correspond to the total power the load dissipates. The voltage between the two wires is measured, and the hot wire—the wire that supplies electricity to the load—is used to measure the current.
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