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In a photoelectric effect, the energy of...

In a photoelectric effect, the energy of the photon striking a metallic surface is `5.6xx10^(-19)J`.
The kinetic energy of the ejected electron is `12.0xx10^(-20)J` . The work function is

A

`6.4xx10^(-19)J`

B

`6.8xx10^(-19)J`

C

`4.4xx10^(-19)J`

D

`6.4xx10^(-20)J`

Text Solution

Verified by Experts

The correct Answer is:
C
Work function `hv_(0)=hv-KE`
`=5.6xx10^(-19)-12xx10^(-19)=4.4xx10^(-19)J`
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