Discussion :: Measurements and Instrumentation
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In household energy meters the flux of series magnet is in phase with current but the flux of shunt magnet lags the voltage by 88°. The reading of energy meters
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A.
will be correct
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B.
will have a negative error
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C.
will have a positive error
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D.
may have positive or negative error
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Answer : Option B
Explanation :
Since angle is less than 90°, reading will be less. Therefore error is negative and correction is positive.
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