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Photo-electrons are produced by from a m...

Photo-electrons are produced by from a metal surface using a radiation of wavelength `6561Å` . These photo-electrons, when made to enter a uniform magnetic field of intensity `3 xx 10^(-4)` T, move along different circular paths with a maximum radius of 10mm, then the work function of the metal is close to

A

3.1 eV

B

0.1 eV

C

2.1 eV

D

1.1 eV

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The correct Answer is:
D
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