Photoelectric EffectHard
Question
The anode voltage of photocell is kept fixed. The wavelength λ of the light falling on the cathode is gradually changed. The plate current I of the photocell varies as follows :
Options
A.
B.
C.
D.
Solution
For constant intensity as wavelength decreases energy of photons increases and number of photons decreases. So it may seem that current should decrease. But the probability that a photon will be successful in emitting an electron will also increase. So as wavelength decreases current increases.
Create a free account to view solution
View Solution FreeMore Photoelectric Effect Questions
The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV. The ...Consider a metal used to produced some charateristic X-rays. Energy of X-rays are given by E and wavelength as represent...Quantam nature of light can be explained by...If a0 is the Bohr radius, the radius of the n = 2 electronic orbit in triply ionized beryllium is -...A candle of diameter d is floating on a liquid on a liquid in a cylindrical container of diameter D(D>>d) as shown in fi...