Geometrical Optics | JEE Main 2024 | Photoelectric Current

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JEE MAIN 2024

27-01-2024 SHIFT-1

Question

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 replaced by another convex lens having the same diameter but focal length 20 cm. The photoelectric current now is :

Select the correct option:

A

$\frac{I}{2}$

B

$4I$

C

$2I$

D

$I$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

As amount of energy incident on cell is same so current will remain same

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