JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

1 Medium

1 of 1

Application +4 | -1

The threshold frequency

v_0

for a metal is

7.0 \times 10^{14} \mathrm{~s}^{-1}

. Calculate the kinetic energy of an electron emitted when radiation of frequency

v=1.0 \times 10^{15} \mathrm{~s}^{-1}

hits the metal.

View answer and explanation

Correct option: A

1.988 \times 10^{-19} \mathrm{~J}

Option A (

1.988 \times 10^{-19} \mathrm{~J}

) is correct because it is the kinetic energy of the emitted electron calculated using Einstein's photoelectric equation.

More Questions from STRUCTURE OF ATOM

Practice All Chapter MCQs →

n^{\text {th }}

\mathrm{A}

\times 10^{12}

\frac{1}{{ }^{\prime} \mathrm{B}^{\prime}}

\ell = 1,\,\,m = 0

1.25 \times {10^{ - 13}} \times {A^{1/3}}\mathrm{cm}.