In which of the following situations is photoelectric effect employed?
I. Automatic devices for switching on light at dusk
II. Automatic doors in departmental stores
III. Automatic devices for switching on air conditioners
IV. Automatic voltage stabilizers
a
I, II and IV only
b
I, III and IV only
c
III and IV only
d
I and II only
Explanation
Correct Option
aNo explanation available
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Discussions (6)
Fasola4peace
2 years ago
I think the correct answer should be D (i.e i and ii) because there is no application of photoelectric effect on Air Conditioner and Stabilisers
