Which of the following statements are correct? (a) Light Dependent Resistors (LDRs) are based on Photo conductive Effect.

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Which of the following statements are correct? (a) Light Dependent Resistors (LDRs) are based on Photo conductive Effect.

85. Which of the following statements are correct?

(a) Light Dependent Resistors (LDRs) are based on Photo conductive Effect.

(b) In LDRs, resistance increases from its dark resistance value with increase in light intensity.
(c) LDRs are slow responding to changes in light intensity.
(d) Photodiodes can be operated only in the photoconductive region.
(e) Photodiodes have a faster switching time than Photo-transistors.

A. (a), (c) and (d) only
B. (a), (b) and (c) only
C. (a), (b) and (e) only
D. (a), (c) and (e) only

Answer: Option D

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