A potential divider is made from a light-dependent resistor (LDR) connected in series with a variable resistor with resistance $R$. As the light intensity rises, the resistance of the LDR falls. The variable resistor may be adjusted to either high resistance or low resistance. In which arrangement is the output voltage greatest?
- Alight level at LDR: high, $R$ high
- Blight level at LDR: high, $R$ low
- Clight level at LDR: low, $R$ high
- Dlight level at LDR: low, $R$ low