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The work functions of metals A and B are in the ratio 1 : 2. If light of frequencies f and 2f are incident on the surface of A and B respectively, the ratio of the maximum kinetic energies of photoelectrons emitted is (f is greater than thershold frequency of A, 2f is greater than threshold frequency of B)

A

`1:1`

B

`1:2`

C

`1:3`

D

`1:4`

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The correct Answer is:
B
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