Question

What is the effect on range and sensitivity of an ammeter when the value of its shunt resistance increases? 
 

Hint:

The shunt resistance helps to protect the ammeter from high currents, but increasing it reduces the meter's sensitivity while increasing its measuring range.

Answer 1

- Range: Increasing the shunt resistance decreases the total resistance of the circuit, which increases the maximum current (or range) that can be measured by the ammeter. In other words, a higher shunt resistance extends the range of the ammeter. - Sensitivity: Increasing the shunt resistance reduces the sensitivity of the ammeter. This is because the current is divided between the ammeter and the shunt, and with a higher shunt resistance, the current through the ammeter decreases.