1.

\[{{10}^{-3}}W\] of \[\text{5000}\overset{\text{o}}{\mathop{\text{A}}}\,\]light is directed on a photoelectric cell. If the current in the cell is\[0.16\mu A\]. The percentage of incident photons which produce photoelectrons, is

A. 0.004
B. 0.0004
C. 20%     
D. 0.1
Answer» C. 20%     


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