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Pmmc meter are most accurate instrument for DC measurement however they are unable to measure the AC quantity. The working principle is as follows: a moving coil is free to move in a external static magnetic field. And the pointer moves according to the interaction of two fields, field of static mag. and that of measuring quantity. Now in case of it is impossible to produce a sustained magnetic field, that's why we can not use PMMC to measure the ac.
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Instrument used to measure length in metric system?
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the answer is a ruler because it is and instrument used to measure someone in govern
An instrument used to measure mass is call?
This instrument is a balance.
What is the instrument used to measure angles is the?
The instrument you are looking for is a compass
Instrument used to measure length in metric system?
there are many instruments used to measure length depending upon the size of object , Ruler is Metric instrument used to measure length. Screw gauge is also used as an instrument used to measure length in mm.
