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  • What is the work function of a metal if the energy required to liberate the most weakly bound surface electrons from that metal is 3.2 eV?Option: 1 <

What is the work function of a metal if the energy required to liberate the most weakly bound surface electrons from that metal is 3.2 eV?

Option: 1

1.6\times10^{-19}J


Option: 2

5.12\times10^{-19}J


Option: 3

3.2\times10^{-19}J


Option: 4

2.0\times10^{-19}J


Answers (1)

best_answer

The work function of a metal is the minimum energy required to liberate the most weakly bound surface electrons from that metal without giving them any velocity. It is denoted by \phi_{0}.

Given, the energy required to liberate the most weakly bound surface electrons from the metal is 3.2 eV. We know that 1eV= 1.6\times10^{-19}J.

Therefore, the work function of the metal can be calculated as follows:
\phi_{0}= 3.2eV\times1.6\times10^{-19}J/eV
\phi_{0}= 5.12\times 10^{-19}J
 

Posted by

manish painkra

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