The meter constant of an energy meter will be given in:

• A. kW/Revolutions
• B. Revolutions/kWh
• C. kWh/Revolutions
• D. Revolutions/kW

Answer: (B)

Meter constant =  No. of revolution/kWh
Hence the number of revolutions made by the disc for 1 kWh of energy consumption is called meter constant.
The meter constant is always written on the name plates of the energy meters installed m homes, commercial and industrial establishments. If the meter constant of an energy meter is 1500 rev/kWh, it means that for the consumption of 1 kWh, the disc will make 1500 revolutions.