Question

The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency ν of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by–

• A. Slope of the line
• B. Product of slope on the line and charge on the electron
• C. Product of intercept along Y-axis and mass of the electron
• D. Product of slope and mass of electron

Answer 1

Answer: (B)

Product of slope on the line and charge on the electron

Answer 2

V₀ = $\left( \frac { \mathrm { h } } { \mathrm { e } } \right)$ ν – $\frac { \mathrm { W } } { \mathrm { e } }$

* Slope ⇒ m = tan θ =

* $\mathrm { h } =$ Slope $\times \mathrm { e }$