List of top Physics Questions on Photoelectric Effect asked in KCET

Work function of the metal is
Pick out the WRONG statements about magnetic substances (\(\chi\) = magnetic susceptibility) (\(\mu_r\) = relative permeability).
I. Substances with \(-1 \le \chi<0\) are diamagnetic
II. Substances with \(\chi \gg 1\) are paramagnetic
III. Substances with \(\chi \ll 1\) are ferromagnetic
IV. Substances with \(\mu_r \gg 1\) are ferromagnetic

The anode voltage of a photocell is kept fixed. The frequency of the light falling on the cathode is gradually increased. Then the correct graph which shows the variation of photo current \( I \) with the frequency \( f \) of incident light is 

Light of energy \( E \) falls normally on a metal of work function \( W_0 \). The kinetic energies \( K \) of the photoelectrons are
The photoelectric work function for a photo metal is \( 2 \, \text{eV} \). Among the four wavelengths, the wavelength of light for which photoemission does not take place is
In an experiment to study photo-electric effect the observed variation of stopping potential with frequency of incident radiation is as shown in the figure. The slope and y-intercept are respectively
observed variation of stopping potential with frequency of incident radiation

The kinetic energy of photoelectrons increases by 0.52 eV when the wavelength of incident light is changed from 500 nm to another web length which is approximately

In a photoelectric experiment, if both the intensity and frequency of the incident light are doubled then the saturation photo electric current

The work function of a metal is $1\, eV$. Light of wavelength $3000 \,?$ is incident on this metal surface. The velocity of emitted photoelectrons will be
A proton moving with a momentum $P _{1}$ has a kinetic energy $\frac{1}{8}$ th of its rest mass energy. Another light photon having energy equal to the kinetic energy of the possesses a momentum $P _{2} .$ Then the ratio $\frac{ P _{1}- P _{2}}{ P _{1}}$ is equal to
According to Einstein’s photoelectric equation to the graph between kinetic energy of photoelectrons ejected and the frequency of incident radiation is
The work function of a metal is 1eV. Light of wavelength 3000Å is incident on this metal surface. The velocity of emitted photoelectrons will be
The maximum kinetic energy of the photoelectrons depends only on
From the figure describing photoelectric effect we may infer correctly that ........
The units of Planck's constant are