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When monochromatic radiation of intensity I falls on a metal surface, the number of photoelectrons and their maximum kinetic energy are N and T respectively. If the intensity of radiation is 2I, the number of emitted electrons and their maximum kinetic energy are respectively

(a) N and 2T                                 (b) 2N and T

(c) 2N and 2T                                (d) N and T

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