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(d) is the same for all metals and independent of the intensity of the radiation.
9 In photoelectric effect what determines the maximum velocity of electron reacting the
collector?
(a) Frequency of incident radiation alone
(b) Work function of metal
(c) Potential difference between the emitter and the collector
(d) All of these
10 The wavelength of a photon needed to remove a proton from a nucleus which is bound to
the nucleus with 1 MeV energy is nearly [NCERT Exemplar]
(a) 1.2 nm
-3
(b) 1.2 × 10 nm
-6
(c) 1.2 × 10 nm
1
(d) 1.2 × 10 nm