You visited us 1 times! Enjoying our articles? Unlock Full Access!

Work Function

When the ener...

Question

When the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface is increased from 0.5 eV to 0.8 eV. The work function of the metal is

0.65 eV

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.0 eV

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

1.3 eV

No worries! We‘ve got your back. Try BYJU‘S free classes today!

1.5 eV

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B 1.0 eV
$E = h v - ϕ \Rightarrow 0.5 = h v - ϕ \dots (1) A g a i n 0.8 = 1.2 h v - ϕ \dots (2) F r o m e q u a t i o n (1) \times 1.2 \Rightarrow 0.6 = 1.2 h v - 1.2 ϕ E q u a t i o n (2) 0.8 = 1.2 h v - ϕ - - + - ------------- - - 0.2 = - 0.2 ϕ ϕ = 1 e V$

Suggest Corrections

Similar questions

20 %

0.5 eV

0.8 eV

20

0.5 e V

0.8 e V

30

0.4 e V

0.9 e V

5 e V

6.2 e V

[e V = 1.6 \times 10^{- 19}]

Join BYJU'S Learning Program