Ammeter Am"me*ter, n. (Physics) A contraction of amperometer or amp[`e]remeter.Meaning of Ammeter from wikipedia- An ammeter (abbreviation of ampere meter) is an instrument used to measure the current in a circuit. Electric currents are measured in amperes (A), hence...- meter with ...
A small resistance S, Called shunt resistance is connected in parallel with thr galvanometer coil , so that most of the current pass through the shunt . Since G and S are in parallel P.d across S- p.d. across G i.e (I-I(g))S= I(g)G S= (I(g)G)/(I-