Question

The following graph shows the stopping potential V₀ versus frequency v for photoelectric emission from two metals A and B. The slope of each of the lines gives ______

 

Options

• the charge of an electron.

• Planck's constant.

• the product of the charge of electron and Planck's constant.

• the ratio of Planck's constant and the charge of the electron.

Answer 1

The following graph shows the stopping potential V₀ versus frequency v for photoelectric emission from two metals A and B. The slope of each of the lines gives the ratio of Planck's constant and the charge of the electron.

Explanation:

The slope of V₀ versus v graph is `"h"/"e"` because 

eV₀ = hv - hv₀

∴ V₀ = `"h"/"e""v" - "h"/"e""v"_0`.