Figure represents a graph of kinetic energy K of photoelectrons and frequency v for a metal used or cathode in photoelectric experiment. The work function of metal is

Question

Figure represents a graph of kinetic energy K of photoelectrons and frequency v for a metal used or cathode in photoelectric experiment. The work function of metal is (A) 1 eV (B) 1.5 eV (C) 2 eV (D) 3 eV

Tardigrade Admin · Accepted Answer

K max =h v-φ0 (Einstein's photoelectric equation) Above equation is equation of a straight line with y-intercept φ0, so from graph, work function is 1 eV.

Q. Figure represents a graph of kinetic energy $K$ of photoelectrons and frequency $v$ for a metal used or cathode in photoelectric experiment. The work function of metal is

$1 e V$

$1.5 e V$

$2 e V$

$3 e V$

$K_{m a x} = h v - ϕ_{0}$ (Einstein's photoelectric equation)
Above equation is equation of a straight line with $y$ -intercept $ϕ_{0}$ , so from graph, work function is $1 e V$ .

Q. Figure represents a graph of kinetic energy K of photoelectrons and frequency v for a metal used or cathode in photoelectric experiment. The work function of metal is

1eV

1.5eV

2eV

3eV