Photoelectric EffectMedium
Question
A beam of light falls on a metal surface such that photo-electrons are generated. If power of the light source starts to decrease linearly with time $t$, then variation of the photocurrent $I$ and magnitude of the stopping potential | $V \mid$ with time is best represented by:
Options
A.
B.
C.
D.
Solution
Sol. [Key Concept: Photoelectric effect — photocurrent depends on intensity]
Power of source is decreasing that means number of photon is decreasing linearly with time and source is same so, energy of photon is same.
Power $(P) \propto nE$
$P \propto n$ (number of photons per second)
and energy of photon is constant.
Create a free account to view solution
View Solution FreeMore Photoelectric Effect Questions
De Broglie wavelength of incident electrons at metal Mo is 0.1 . The minimum wavelength of X-ray produced from Mo is...A photon is moving a momentum of 3.6 × 10-29 kg-ms-1. If the velocity of light is 3 × 108 ms-1. The energy of ...A photon of energy 4 eV is incident on a metal surface whose work function is 2eV. The minimum reverse potential to be a...In a photoelectric experiment, electrons are elected from metals X and Y any light of intensity I and frequency f. The p...The speed of a proton is . The wavelength associated with it will be -...