Physics · 2024
JEE Main · 27 January 2024, Shift 1 · Q46
A convex lens of focal length 40 cm forms an image of an extended source of light on a photoelectric cell. A current I is produced. The lens is…
A convex lens of focal length $\displaystyle 40$ cm 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 $\displaystyle 20$ cm. The photoelectric current now is :
Official answer
From NTA’s final answer key for this paper.
(2)
I
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JEE Main 2024 Physics question, with the answer from NTA’s final answer key. Where our answers come from.