JEE Main 2024 (27 Jan, Shift 1) Physics Q46: A convex lens…

Question

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

(1) $\frac{I}{2}$
(2)IOfficial answer
(3)2 I
(4)4 I

Official answer

Option 2

NTA final key.

Accepted Answer

Option 2: I

Answer

$\frac{I}{2}$

Answer

I

Answer

2 I

Answer

4 I

JEE Main 27 January 2024, Shift 1, Physics Q46