Step 1: Meaning of shunt.
A shunt is a very small resistance connected in parallel with a galvanometer or other instruments.
Step 2: Function.
It allows most of the current to bypass the galvanometer, protecting it from high current.
Step 3: Use.
By connecting a shunt across a galvanometer, it can be converted into an ammeter for measuring large currents.
Step 4: Conclusion.
Thus, shunts are protective and functional elements in measurement circuits.