How do Light dependent resistors work in automatic street lights?
varghese p asked:
I understand that as the light intensity increases the resistance decreases and vice versa in an LDR. But I don’t know why, shouldn’t it be the other way around because in the morning when there is high light intensity shouldn’t it there be high resistance to prevent any current to light up the bulb. And at night when there is low light intensity the resistance decreases to allow more current to light up the bulb. Thanks!
I understand that as the light intensity increases the resistance decreases and vice versa in an LDR. But I don’t know why, shouldn’t it be the other way around because in the morning when there is high light intensity shouldn’t it there be high resistance to prevent any current to light up the bulb. And at night when there is low light intensity the resistance decreases to allow more current to light up the bulb. Thanks!