The threshold frequency for a photosensitive metal is Hz. If light of frequency Hz is incident on this metal, the cut-off voltage for the photoelectric emission is nearly
2V
3V
5V
1V
As we discussed in concept
Conservation of energy -
- wherein
&
Stopping Potential /Cut-off Potential -
It is defined as the potential necessary to stop any electron from reaching the other side.
-
=
=
Option 1)
2V
This option is correct.
Option 2)
3V
This option is incorrect.
Option 3)
5V
This option is incorrect.
Option 4)
1V
This option is incorrect.