When the work function of a metal increases, maximum kinetic energy of emitted photoelectrons

When the work function of a metal increases, maximum kinetic energy of emitted photoelectrons
  1. first decreases and then increases.
  2. increases.
  3. remains same.
  4. decreases.

Solution

(K.E.) $_{\max }=h v-w_{0}$ Hence if $w_{0}$ increase (K.E.) $_{\max }$ Decreases

Asked in: MHT CET 2020 (13 Oct Shift 2)

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