anonymous 4 years ago An ammeter deflects full scale with a current of 5 amperes and has a total resistance of 0.5 ohms what sunt resistance must be connected to it to measure 25 amperes full scale?

1. y2o2

$Rs = {I_g . R_g \over I-I_g} = {5 \times 0.5 \over 25-5} = {1 \over 8} \ \ ohm$