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JEEMAIN-2014
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Q)
If a photo cell is illuminated with a radiation of
1240
A
∘
, the stopping potential is found to be
6
V
, then the work function of the emitter and the threshold wavelength are
2
e
V
,
6200
A
∘
3
e
V
,
3140
A
∘
4
e
V
,
3100
A
∘
6
e
V
,
2070
A
∘
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