MCQOPTIONS
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| 1. |
An image of the sun is formed by a lens of focal length of 30 cm on the metal surface of a photoelectric cell and a photoelectric current I is produced. The lens forming the image is then replaced by another of the same diameter but of focal length 15 cm. The photoelectric current in this case is [Manipal MEE 1995] |
| A. | \[\frac{I}{2}\] |
| B. | I |
| C. | 2I |
| D. | 4I |
| Answer» E. | |