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Statement – 1 : When ultraviolet light is incident on a photocell, its stopping potential is V_o and the maximum kinetic energy of the photo-electrons is K_max. When the ultraviolet light is replaced by X-rays, both V_o and K_max increase.
Statement – 2 : Photoelectrons are emitted with speeds ranging from zero to a maximum value because of the range of frequencies present in the incident light.

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Statement – 1 is false, Statement – 2 is true

Statement – 1 is true, Statement – 2 is true, Statement – 2 is the correct explanation of Statement - 1

Statement – 1 is true, Statement – 2 is true, Statement – 2 is not the correct explanation of Statement - 1

Statement – 1 is true, Statement – 2 is false

answer is D.

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Detailed Solution

As frequency of incident radiation increases maximum KE and stopping potential both will increase. Range of KE is not due to range of frequencies.
$3 {eV}_{0} = \frac{hc}{λ} - \frac{hc}{λ_{0}}$

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