A galvanometer, a highly sensitive instrument for detecting minute currents, requires modification to function as an ammeter capable of measuring larger currents. This conversion is necessary to safeguard the galvanometer from damage. The method involves diverting the majority of the current away from the galvanometer. This is accomplished by placing a shunt, a resistor of very low resistance, in parallel with the galvanometer. Consequently, the bulk of the current traverses this low-resistance shunt, leaving only a minimal, safe current to flow through the galvanometer. This configuration allows the galvanometer to accurately measure currents across an extended range without sustaining damage.