Measurement and Instrumentation
A moving coil of a meter has 100 turns, and a length and depth of 10 mm and 20 mm respectively. It is positioned in a uniform radial flux density of 200 mT. The coil carries a current of 50 mA. The torque on the coil is

 100 µNm.
 1 µNm.
 2 µNm.
  200 µNm.

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Measurement and Instrumentation
It can be stated that

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

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