Name the unit in which work function of a metal is generally expressed. How is it related to the S. I. unit joule?

e V, 1 e V = 1.6 \times 10^{9} J

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e V, 1 e V = 1.6 \times 10^{- 9} J

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e V, 1 e V = 1.6 \times 10^{- 19} J

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e V, 1 e V = 1.6 \times 10^{19} J

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Solution

The correct option is D $e V, 1 e V = 1.6 \times 10^{- 19} J$
Work function is expressed in $e V$ , and $1 e V = 1.6 \times 10^{- 19} J$
By definition, Electronvolt (eV) is the amount of energy gained (or lost) by the charge of a single electron moved across an electric potential difference of one volt

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Similar questions

100

h = 6.2 \times 10^{- 34} J s; 1 e V = 1.6 \times 10 - 19 J

1 e v = 1.6 \times 10^{- 19} J

(G i v e n h = 6.63 \times 10^{- 34} J s, m_{e} = 9 \times 10^{- 31} k g, 1 e V = 1.6 \times 10^{- 19} J)

1 e v = 1.6 \times 10^{- 19} J

80

(1 e V = 1.6 \times 10^{- 19} J,

= 9 \times 10^{- 31} k g

= 6.6 \times 10^{- 34} J - s)

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