engineering recuitment GATE IN Test Series 2023-24 Mock Test Communication Systems Optical Sources and Detector Light Dependent Resistor
A low resistance LDR of 20Ω, operated at a certain intensity of light, is to be protected through a series resistance in such a way that up to 12 mA of current is to flow at a supply voltage of 10 V. What is the nearest value of the protective resistance?
1
873 Ω
2
813 Ω
3
273 Ω
4
81 Ω