Moving-coil meter has resistance of 100ohm, current for f.s.d. 5mA. what is the value of paraller resistor?

Question

to emable it to read up to 10A?

Answer 1

Use Ohm's law to calculate the p.d. across the meter terminals:

V = I * R = 0.005 * 100 = 0.5v

If 5 mA is going through the meter, then the f.s.d. current through the parallel resistor = 10 - 0.005 = 9.995 A

R= V/I = 0.5 / 9.995 = 0.0500 ohms