MCQOPTIONS
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| 1. |
In a photo cell, the photo-electrons emission takes place |
| A. | After \[{{10}^{1}}\] sec on incident of light rays |
| B. | After \[{{10}^{3}}\]sec on incident of light rays |
| C. | After \[{{10}^{6}}\]sec on incident of light rays |
| D. | After \[{{10}^{8}}\]sec on incident of light rays |
| Answer» E. | |