Monochromatic light of intensity I ejects N photoelectrons of maximum kinetic energy T. If intensity is doubled to 2I, number of electrons and maximum kinetic energy become:
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Monochromatic light of intensity I ejects N photoelectrons of maximum kinetic energy T. If intensity is doubled to 2I, number of electrons and maximum kinetic energy become:

G1 Physics · Accepted Answer

The number of incident photons per second is proportional to intensity at fixed ν, hence emitted electron count doubles: N′ = 2N. Kₘₐₓ = hν − W is unchanged because frequency is unchanged. Answer: B.