The work functions for metals A, B and C are
respectively 1.92 eV, 2.0 eV and 5 eV. According
to Einstein’s equation, the metals which will
emit photoelectrons for a radiation of wavelength 4100 Å is/are
(a) none (b) A only
(c) A and B only (d) all three metals
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all the 3 metals emitt photoelectrons
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