In circuit analysis, the complex power is S = P + jQ. For the avarage power P, we can use wattmetter to measure P. But how we can measure the reactive power Q in the circuit ?

# Help me about the complex power in circuit analysis

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# Help me about the complex power in circuit analysis

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In circuit analysis, the complex power is S = P + jQ. For the avarage power P, we can use wattmetter to measure P. But how we can measure the reactive power Q in the circuit ?

## Best Answer

To measure reactive power you use a VAR meter.

The indicated number is \$V \times A \times sin(\theta)\$, so the indication will be zero for a resistive load.