A metal’s work function is 3.8KJ. Photons strike metal’s surface with an energy of 5.2 KJ. what’s the kinetic energy of the emitted electrons?(a) 3.8 KJ(b) 5.2 KJ(c) 9 KJ(d) 1.4 KJI got this question during an online exam.The query is from Developments Leading to the Bohr’s Model of Atom in portion Structure of Atom of Chemistry – Class 11

A metal’s work function is 3.8KJ. Photons strike metal’s surface w

1.	A metal’s work function is 3.8KJ. Photons strike metal’s surface with an energy of 5.2 KJ. what’s the kinetic energy of the emitted electrons?(a) 3.8 KJ(b) 5.2 KJ(c) 9 KJ(d) 1.4 KJI got this question during an online exam.The query is from Developments Leading to the Bohr’s Model of Atom in portion Structure of Atom of Chemistry – Class 11
Answer» CORRECT ANSWER is (d) 1.4 KJ To elaborate: As per the formula of the PHOTOELECTRIC effect, we have E = K.E. + Wo. E is the energy of photons; K.E. is the kinetic energy with which electrons are emitted and Wo is the work function. K.E. = 5.2 KJ – 3.8 KJ = 1.4 KJ.

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