Question

if maximum k.e. of electron emitted by a photo cell is 4 ev what is its stopping potential

Answer 1

STOPPING POTENTIAL:-         
The minimum potential at which the plate photoelectric current becomes zero is called stopping potential.
If V0 is  the stopping potential,then  
eV0=h(υ-υ0)
then solve by putting the values

Answer 2

4v hai ixka ans smji pglettt....