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Photons of wavelength 6556 A^@ falls on ...

Photons of wavelength `6556 A^@` falls on a metal surface. If ejected electrons with maximum K.E. moves in magnetic field of `3 xx 10^(-4) T` in circular orbit of radius `10^(-2)` m, then work function of metal surface is

A

1.8 eV

B

0.8 eV

C

1.1 eV

D

1.4 eV

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The correct Answer is:
C
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