Question

An ammeter has a resistance of 0.05 ohms and reads 1ampere per scale division. What shunt is required so that it will read 10 ampere per scale division ?

Answer 1

$$I_s=I-I_a=10-1=9\ A$$

$$U=I_sR=I_ar$$

$$9R=(1)(0.05)$$

$$R=0.0056\Omega$$