The circuit diagram depicts a variable potential divider. As the slider is shifted from P towards Q, what effect does this have on the voltmeter reading and on the lamp’s brightness?
- Areading on voltmeter decreases; brightness of lamp decreases
- Breading on voltmeter decreases; brightness of lamp increases
- Creading on voltmeter increases; brightness of lamp decreases
- Dreading on voltmeter increases; brightness of lamp increases