The error in a single phase energy meter where pressure coil lags behind appli

The error in a single phase energy meter where pressure
coil lags behind applied voltage by 88 degrees and pf is 1)
upf 2).5lag

Question Posted / sandeep

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The error in a single phase energy meter where pressure coil lags behind applied voltage by 88 deg..

Answer / sandeep

Both case i got the same answer -.061%. But this option is
not present at all ...please help

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