Question

in photoelectric experiment zinc electrode work function 4.3ev is subjected to an electromagnetic radiation having photon energy as 5.3ev the photoelectric current can be stopped if an external accelerating potential 1.5v is applied the contact potential between the emitter and collector has magnetise equal to 2.8V 3.81.0​

Answer 1

Answer:

Correct answer is $3.4X10^{-19} J$