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Q.

Figure represents a graph of kinetic energy K of photoelectrons and frequency ϑ for a metal used for cathode in photoelectric experiment. The work function of metal is

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a

1eV

b

1.5eV

c

2eV

d

3eV

answer is A.

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Detailed Solution

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eVs=hν-ϕ=K

For frequency = 0,

ϕ=-K=1 eV 

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Figure represents a graph of kinetic energy K of photoelectrons and frequency ϑ for a metal used for cathode in photoelectric experiment. The work function of metal is