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JEEMAIN and NEET
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JEEMAIN PAST PAPERS
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2006
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Q)
The threshold frequeny for a metallic surface corresponds to an energy of 6.2 eV and the stopping potential for a radiation incident on this surface is 5V. The incident radiation lies in :
( A ) infra-red region
( B ) ultra-violet region
( C ) X-ray region
( D ) visible region
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