Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 3750 rev/KWh.
 960 rev/KWh.
 3600 rev/KWh.
 1000 rev/KWh.

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Measurement and Instrumentation
It can be stated that

CT operates with a higher flux density than PT
CT operates at almost the same flux density as a PT
CT operates with considerably lower flux density than a PT
No generalisation can be made with regard to the flux densities in CT and PT

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