Question

Calculate the stopping potential if the maximum K.E. of photoelectrons emitted by a photocell is 4eV.​

Answer 1

The stopping potential is 4 volts.

Explanation:

K.E. = eV0  

Where

• e= charge on the electron.
• V0= stopping potential

Given kinetic energy of an electron is 4 eV.

To convert it into  joule we multiply  it by e. (As 1 eV = 1.6 X 10^-19 J)

Therefore 4e = eV​0  

V0=  4 volts

Hence the stopping potential is 4 volts.

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