Q139. The work function of a metal is 2.0 eV. If radiation with a wavelength of 3000 Å is incident on it, what is the maximum kinetic energy of the emitted photoelectrons? (Given: Planck's constant, h = 6.6 × 10-34 J·s; speed of light, c = 3.0 × 108 m/s; 1 eV = 1.6 × 10-19 J)Physics — NUST Mock By IBAGRADS 5 — Question 139 of 200A. 4.4 × 10-19 JB. 5.6 × 10-19 JC. 3.4 × 10-19 JD. 2.5 × 10-19 JPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →