In an experiment on photoelectric effect, the frequency f of incident light is plotted against the stopping potential V0. The work-function of the photoelectric surface is given by

Question

In an experiment on photoelectric effect, the frequency f of incident light is plotted against the stopping potential V0. The work-function of the photoelectric surface is given by (A) O B × e( in eV ) (B) O B (in volts) (C) O A( in eV ) (D) the slope of line A B

Tardigrade Admin · Accepted Answer

By Einstein's equation, we have e V0=h v-φ0 or V0=(h/e) v-(φ0/e) Above is a equation of straight line (y=m x+c) with slope (h/e) and y-intercept =(φ0/e) ∴ Work function, φ0=e × intercept ( eV )

Q. In an experiment on photoelectric effect, the frequency $f$ of incident light is plotted against the stopping potential $V_{0}$ . The work-function of the photoelectric surface is given by

$OB \times e ($ in $e V)$

$OB$ (in volts)

$O A ($ in $e V)$

the slope of line $A B$

By Einstein's equation,
we have $e V_{0} = h v - ϕ_{0}$
or $V_{0} = \frac{h}{e} v - \frac{ϕ _{0}}{e}$
Above is a equation of straight line $(y = m x + c)$
with slope $\frac{h}{e}$ and $y$ -intercept $= \frac{ϕ _{0}}{e}$
$∴$ Work function, $ϕ_{0} = e \times$ intercept $(e V)$

Q. In an experiment on photoelectric effect, the frequency f of incident light is plotted against the stopping potential V0​. The work-function of the photoelectric surface is given by

OB×e( in eV)

OB (in volts)

OA( in eV)

the slope of line AB