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 In a single phase induction type energy meter, the lag adjustment is done
  • a)
    to bring the pressure coif flux in phase with the applied voltage 
  • b)
    to make the current coil flux to lag 90° behind the applied voltage
  • c)
    to make the pressure coil flux to lag 90° behind the applied voltage
  • d)
    none of the above
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
In a single phase induction type energy meter, the lag adjustment is d...
For the energy meter to record true energy the pressure coil should be highly inductive (i.e, Δ = 90°). Thus, for the angle between the shunt magnet flux (φρ) and the supply voltage to be 90°, a lagging coil is placed between the potential coil and the rotating aluminium disc. Lag adjustment sometimes is called power factor or quadrature or inductive load adjustment.
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Most Upvoted Answer
In a single phase induction type energy meter, the lag adjustment is d...
° behind the applied voltagec)to correct for errors in the meter caused by power factord)to ensure that the meter is accurate regardless of the load power factor.

Answer: b)to make the current coil flux to lag 90° behind the applied voltage
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