Q.

At frequencies of the incident radiation above the threshold frequency, the ·photoelectric current in a photoelectric cell increases with increase in 

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a

frequency of incident radiation 

b

intensity of incident radiation 

c

wavelength of incident radiation 

d

speed of incident radiation

answer is A.

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Detailed Solution

Photoelectric current in a photocell increases with increases in frequency, 

1λ=ϕhc

As per equation,
The intensity of light increases, the saturation current increases, This is because a larger number of photons now fall on the metal surface and hence a larger number of electrons interact with photons. The number of electrons emitted increases and hence the current increases.

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