Question

How is a galvanometer converted into an ammeter?

• A. By connecting a high resistance shunt in parallel to the galvanometer
• B. By connecting a low resistance shunt in parallel to the galvanometer
• C. By connecting a high resistance shunt in series with the galvanometer
• D. By connecting a low resistance shunt in series with the galvanometer

Hint:

A low resistance shunt in parallel with the galvanometer allows high currents to bypass it, enabling the device to measure larger currents without damage.

Answer 1

The Correct Option is B

Step 1: Understanding the Purpose of a Shunt
To convert a galvanometer into an ammeter, a shunt resistor is used.
The purpose of the shunt is to allow a large current to bypass the galvanometer, which is typically designed for small currents.
This prevents the galvanometer from being damaged by high currents.
Step 2: Why the Shunt is Connected in Parallel
A shunt resistor is connected in parallel to the galvanometer so that the majority of the current flows through the shunt, leaving only a small portion of the current to pass through the galvanometer.
This allows the galvanometer to measure high currents without being damaged.
Step 3: Conclusion
Thus, a galvanometer is converted into an ammeter by connecting a low resistance shunt in parallel to it.