Two different metals, M1 and M2, are used as the cathode in separate photoelectric experiments. M1 has a larger work function than M2. If both metals are illuminated with light of the same frequency and intensity, which of the following is TRUE?
The stopping potential for M1 will be lower than that for M2.
The stopping potential for M1 will be higher than that for M2.
The stopping potentials for M1 and M2 will be the same.
The photocurrent for M1 will be higher than that for M2.
Related Questions
When an inert gas is filled in place of vacuum in a photo cell, then
Photo-electric current is decreased
Photo-electric current is increased
Photo-electric current remains the same
Decrease or increase in photo-electric current does not depend upon the gas filled
Photons emitted in transition of electrons from n = 2 to n = 1 in hydrogen atom is made to fall on a metal surface with work function 1.2 eV. The maximum velocity of photoelectron emitted is nearly equal to
Consider the two following statements I and II, and identify the correct choice given in the answers
III. In photovoltaic cells the photoelectric current produced is not proportional to the intensity of incident light.
IV. In gas filled photoemissive cells, the velocity of photoelectrons depends on the wavelength of the incident radiation.
Both I and II are true
Both I and II are false
I is true but II is false
I is false but II is true
An electron is accelerated by a potential difference of V volt to acquire kinetic energy equal to maximum kinetic energy of ejected photoelectron from a metal of work function 3.2 eV, using a light of wavelength 2000\,\mathop {\rm{A}}\limits^ \circ \, Value of V is
1 volt
2 volt
3 volt
5 volt
In a photoelectric experiment, the stopping potential is found to be when photons of energy are incident on a metal surface. What is the work function of the metal in ?
1
2
3
4
Photo cell is a device to
Store photons
Measure light intensity
Convert photon energy into mechanical energy
Store electrical energy for replacing storage batteries
The work function of a metal is . Light of frequency is incident on the metal. If , which of the following is true?
Photoelectrons are emitted with maximum kinetic energy
Photoelectrons are emitted with zero kinetic energy
No photoelectrons are emitted
Photoelectrons are emitted with maximum kinetic energy
A photocell is connected in series with a variable resistor and a sensitive ammeter. The cathode of the photocell is illuminated with monochromatic light of constant intensity. As the resistance of the variable resistor is increased, what happens to the photocurrent and the stopping potential?
The photocurrent decreases, and the stopping potential remains constant.
The photocurrent remains constant, and the stopping potential increases.
Both the photocurrent and the stopping potential decrease.
Both the photocurrent and the stopping potential remain constant.
The ratio of the de Broglie wavelengths of an electron of energy to that of person of mass travelling at a speed of is of the order of
