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Question

A graph is drawn between frequency of the incident radiation (on X- axis) and stopping potential (on Y-axis). Then the slope of the straight line indicates
  1. h.e
  2. (eh)
  3. e/h
  4. h/e

A
h.e
B
h/e
C
e/h
D
(eh)
Solution
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hv=hv0+K.E
but at stopping potential K.E=eV
hv=hv0+eV
V=he(vv0)
slope is he

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