A student sets up a variable potential divider (potentiometer) circuit. What change is observed on the voltmeter reading when the sliding terminal T is shifted from R to S?
- AIt decreases from $12\,\text{V}$ to $0\,\text{V}$.
- BIt increases from $0\,\text{V}$ to $12\,\text{V}$.
- CIt remains at $0\,\text{V}$.
- DIt remains at $12\,\text{V}$.