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NEET Exam Model Paper 5

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Question : 120 of 180

Marks: +1, -0

The fringe width in a YDSE is 2 mm, distance between slits and screen is 1.2 m and separation between the slits is 0.24 mm. The radiation of same source is also incident on a photo cathode of work−function 2.2ev, the stopping potential is

3.1 V
2.2 V
0.9 V
5.3 V

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