Question

NOUIIIII
(a)
A PMMC ammeter has a full scale deflection of 100mA and a coil resistance of 100 ohms.
What will be the value of the resistance required for the instrument to be convereted to read
a full scale reading of 2 Ampere.​

Answer 1

Answer:

Voltage drop across coil is 99*10=990 mill volts

When converted to 0–1 amp Current through shunt is 990 milli amps and 10 ma through coil

Resistance of shunt is 990/990=1 ohm