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JEE Main Physics Class 12 Ray Optics and Optical Instruments Part 2 Questions

Section: Physics

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Question : 1

Total: 102

A convex lens of focal length 40‌cm forms an image of an extended source of light on a photoelectric cell. A current I is produced. The lens is replaced by another convex lens having the same diameter but focal length 20‌cm. The photoelectric current now is :

[27-Jan-2024 Shift 1]

‌
I
2
4I
2I
I

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