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BITSAT 2011 Solved Question Paper

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Question : 40

Total: 150

Light of wavelength 180 nm ejects photoelectron from a plate of a metal whose work function is 2 eV. If a uniform magnetic field of 5 × 10–5 T is applied parallel to plate, what would be the radius of the path followed by electrons ejected normally from the plate with maximum energy ?

1.239 m
0.149 m
3.182 m
2.33 m

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