QJEEM13Ph6302: JEE Main 2013 Physics - Class 12 JEEM13Ph6302 Solution: The anode voltage of a photocell is kept fixed. The wavelength…

Question

Verified Solution • 2025–26 Session moderate

The anode voltage of a photocell is kept fixed. The wavelength

λ

of the light falling on the cathode is gradually changed. The plate current

I

of the photocell varies as follows :

A https://ik.imagekit.io/novatra/photos/a812802f884f8efb7daf7802fa6a3157d3e344a3b5e60789426b01cd40a1b4b8.webp
B https://ik.imagekit.io/novatra/photos/bcfce6f22d9e107555613bb9ccbe478b18fa9483b9116b6afb4448df50a7102d.webp
C https://ik.imagekit.io/novatra/photos/759bb8b06d7824025f57d17d41a0ba2aaceda6229772cca4417acba18e8bbea2.webp
D https://ik.imagekit.io/novatra/photos/9ad095a0890aa6d81065d0f0c2e7b6333618d46fc7d94c95dafdfa932171fb17.webp

Accepted Answer

As

λ

is increased, there will be a value of

λ

above which photo electrons will be cases to come out so photo current will become zero. Hence

(d)

is correct answer.

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