Einstein's Photoelectric Equation — Prelims Questions

Light of frequency $1.0 \times 10^{15},\text{Hz}$ is incident on a metal surface with a work function of $3.125,\text{eV}$. Given Planck's constant $h = 6.63 \times 10^{-34},\text{J}cdot\text{s}$ and $1,\text{eV} = 1.6 \times 10^{-19},\text{J}$, what is the maximum kinetic energy of the emitted photoelectrons?

A metal surface has a work function of $2.0,\text{eV}$. What is the threshold wavelength for photoelectric emission from this surface? (Given: $h = 6.63 \times 10^{-34},\text{J}cdot\text{s}$, $c = 3 \times 10^8,\text{m/s}$, $1,\text{eV} = 1.6 \times 10^{-19},\text{J}$)

When light of frequency $ u_1$is incident on a metal, the stopping potential is$V_1$. When light of frequency$ u_2$is incident on the same metal, the stopping potential is$V_2$. Which of the following expressions correctly relates these quantities?

Which of the following graphs correctly represents the variation of maximum kinetic energy ($K_{max}$) of photoelectrons with the frequency ($ u$) of incident light?

Which of the following statements about the photoelectric effect is INCORRECT?

The work function of a metal is $3.0,\text{eV}$. If light of wavelength $300,\text{nm}$ is incident on it, what will be the stopping potential? (Given: $hc = 1240,\text{eV}cdot\text{nm}$)

A graph of stopping potential ($V_0$) versus frequency ($ u$) for the photoelectric effect from two different metals, P and Q, is shown. If the graph for metal P has a higher y-intercept (more negative) than metal Q, what can be inferred about their work functions and threshold frequencies?