Answer :

Photoelectric equation

eV0 = hv - ϕ0 ……………… equation(1)

Where e = Charge on an electron = 1.6 × 10-19 C

V0 = Stopping Potential

h = plank’s constant

v = frequency of photon

ϕ0 = Work function of the metal

Threshold frequency is the minimum frequency at which photoemission starts taking place from a metal surface. It is represented by v0.

At threshold frequency, stopping potential is zero and energy of the emitted electron is also zero. Energy provided by the incident photon is just sufficient to eject out electrons from the metal surface.

ϕ0 = hv0 ....................equ.02

V0 = Threshold frequency

Putting value of ϕ0 from equ.02 to equ.01

eV0 = hv – hv0

V0 = h (v-v0)/ e = 6.63 × 10-34 × (8.2-3.3) × 1014/1.6 × 10-19

= 2.03 V

For photo emission cut of potential is equal to 2.03 V

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses

If light ofPhysics - Board Papers

A. How does one ePhysics - Board Papers