A PMMC ammeter has a coil resistance of 99 and F. S. D current of 0.1mA. Shunt resistance is 1W. Calculate the current through the meter at
Answer (1)
31st Jul, 2019
I(m) at FSD is 0.1 mA, so I(m) at 0.5 FSD is 0.05 mA
I(s) at FSD is 9.9 mA, so I(s) at 0.5 FSD is 4.95 mA
Total I=I(m)+I(s) = 5 mA
In analog systems, full scale maybe defined by the maximum voltage available or the maximum deflection/FSD or indication of moving coil meter or galvanometer.
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