Physics · Atomic Physics
JEE Main 2024 — 27 January, Shift 1 — Question 41
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 :
- Option A:
- Option B:
4 I
- Option C:
2 I
- Option D:Correct
I
Answer: D
Step-by-step solution
As amount of energy incident on cell is same so current will remain same.
Answer key and solution verified before publishing.
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- Exam
- JEE Main 2024
- Paper
- 27 January, Shift 1
- Subject
- Physics
- Chapter
- Atomic Physics
- Topic
- Photon Theory of Light and Radiation Pressure