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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2010
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Q)

The potential difference that must be applied to stop the fastest photo electrons emitted by a nick surface, having work function 5.01 eV, when ultraviolet light of 200 nm falls on it, must be


( A ) – 1.2 V
( B ) 2.4 V
( C ) 1.2 V
( D ) – 2.4 V

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