1. The problem statement, all variables and given/known data The light-dependent resistor (LDR) in the circuit below is found to have resistance 800 Ω in moonlight and resistance 160 Ω in daylight. Calculate the voltmeter reading, Vm, in moonlight with the switch S open. If the reading of the voltmeter in daylight with the switch S closed is also equal to Vm what is the value of the resistance R? Answers: 8.0 V, 50 Ω 2. The attempt at a solution At first I would like to check whether I understand the scheme correctly. The switch S is a diode (open is a reverse-biased and closed is a forward-biased). The LDR is just a regular resistor, just need to take into account different values of resistance depending on the daytime. Should this be correct? I this representation correct?