Question

(e) For photons of energy 7.10 eV, what stopping potential would be required to arrest the current of photoelectrons

Answer 1

2.37eV stopping potential would be required to arrest the current of photoelectrons.

What is stopping potential ?

The minimal negative voltage that must be provided to the anode to halt the photocurrent is known as stopping potential. When expressed in electron volts, the maximal kinetic energy of the electrons is equal to the stopping voltage.

Kmax = eV₀

2.37eV = eV₀

V₀ = 2.37eV

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