Which one of the following is connected to a galvanometer when it is converted into an ammeter?

A galvanometer is converted into an ammeter by connecting a low resistance, known as a shunt, in parallel with the galvanometer coil [t1][t2]. This configuration allows the majority of the electric current to pass through the low-resistance shunt, protecting the sensitive galvanometer from damage while enabling it to measure larger currents [t6][t8]. The potential difference across the galvanometer and the shunt remains equal in this parallel arrangement [t1]. In contrast, connecting a high resistance in series would convert the galvanometer into a voltmeter [t1][t5]. An ideal ammeter should have zero resistance to avoid altering the circuit's current; therefore, the parallel shunt effectively reduces the overall resistance of the ammeter instrument [t1][t5]. While the ammeter itself is connected in series within a circuit to measure current, its internal conversion requires the shunt to be in parallel [t1][t10].

Sources

1. [1] https://uou.ac.in/lecturenotes/science/BSC-17/Galvanometer%20Ammeter%20by%20Dr.%20Gaurav%20Karnatak.pdf