if the work function of two metals X and Y are 4.17eV and 8.24× 10 to the power minus 19J respectively,then for which metal lesser amount of energy will be required to emit an electron?
if the work function of two metals X and Y are 4.17eV and 8.24× 10 to the power minus 19J respectively,then for which metal lesser amount of energy will be required to emit an electron?
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Answer:
X metal
Explanation:
it will require less energy to emit an electron.
we know that,
The minimum amount of energy required by an electron to just escape from the metal surface is called work function of the metal .
so, as we compare our question to this definition of work function.
given that, two metals X and Y
work function depends on conditions of its surface and nature of metal.
now we have both values in ev .
X = 4.17ev. ; Y = 5.14ev.
so, the above metals that the work function of Y = 5.14ev is the highest, while it is lowest for X = 4.17ev .
for (X = 4.17ev) metal lesser amount of energy will be required to emit an electron
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