(Solved):   photoresistor is used in a voltage divider as R2. If the excitation potential was \( 0 \ma ...

 

photoresistor is used in a voltage divider as R2. If the excitation potential was \( 0 \mathrm{~V} \) and R1 was \( 500 \Omega \) calculate the output voltage V2 across R2: )when a bright light strikes the photoresistor and \( \mathrm{R} 2 \) is \( 475 \Omega \) i) When light is dim and \( \mathrm{R} 2 \) is \( 4 \mathrm{k} \Omega \) ii) When the photoresitor is in a total darkness and \( \mathrm{R} 2 \) is \( 0.4 \mathrm{M} \Omega \)