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In photoelectric effect, the energy of t...

In photoelectric effect, the energy of the photon striking a metallic surface is `5.6 xx 10^(-19)J`. The kinetic energy of the ejected electrons is `12.0 xx 10^(-20)J`. The work function is:

A

`6.4 xx 10^(-19) `J

B

`6.8 xx 10^(-19) J`

C

`4.4 xx 10^(-19) J`

D

`6.4 xx 10^(-20)` J

Text Solution

Verified by Experts

The correct Answer is:
C
`E = w_(0) + K. E`
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Knowledge Check

  • In photo electric effect, the energy photon striking a metallic surface is 5.6 xx 10^(-19)J . The kinetic energy of the ejected electrons is 12.0xx 10^(-20)J . The work function is

    A
    `6.4 xx 10^(-19)J`
    B
    `6.8xx 10^(-19)J`
    C
    `4.4xx 10^(-19)J`
    D
    `6.4 xx 10^(-20)J`

  • The kinetic energy of electron is 3.0 xx 10^(-25)J . The wave length of the electron is

    A
    `7965A^(0)`
    B
    `4625A^(0)`
    C
    `91A^(0)`
    D
    `8967A^(0)`

  • The kinetic energy of the ejected electrons in photoelectric effect is

    A
    Directly proportional to the frequency of the incident radiation
    B
    Inversely proportional to the frequency of the incident radiation
    C
    Not related to the frequency of the incident radiation
    D
    All the above

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