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Communication Systems

Q1:

In Vidicon camera tube, the resistance of photoconductive material on the target plate

A is constant

B is more in darkness and less in brightness

C is more in brightness but less in darkness and brightness

D may be more or less in darkness and brightness

ANS:B - is more in darkness and less in brightness

Light dependent resistor (LDR) has high resistance in darkness and low resistance in brightness.



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