College physcs
posted by Lanise .
A galvanometer with a fullscale sensitivity of 500 microA and a coil resistance of 60 ohms is to be used to build an ammeter designed to read 7.5 A. What is the required shunt resistance?
Rs = milliA

Vf = If * Rg = 5*10^4 * 60 = 0.03 Volts.
Rs = Vf/(7.5IF).
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