Stopping Potential vs Frequency
Trending Questions
Q. The maximum kinetic energy of a photoelectron is E when wavelength of incident light is λ2 . If maximum kinetic energy becomes 2E when wavelength is reduced to λ3 . The work function of the metal (in eV) is (Givenhcλ=15)
Q.
In a photoelectric effect experiment, the potential difference V that must be maintained between the illuminated surface and the collector so as just to prevent any electron from reaching the collector is determined for different frequencies f of the incident radiation. The graph obtained is as shown. The maximum kinetic energy of the electrons emitted at frequency f1 is |
- hf1
- V1(f1−f0)
- h(f1−f0)
- eV1(f1−f0)
Q. Photoelectric current depends on the frequency of the incident light.
- True
- False
Q. In single slit experiment, the width of the slit is
reduced. Then, the linear width of the principal
maxima
(1) decreases but becomes less bright
(2) increases but becomes less bright
(3) decreases but becomes more bright
(4) increases but becomes more bright
Q. The maximum kinetic energy of photoelectrons emitted from a metal surface when light of wavelength λ is incident on it is 1 eV. When a light of wavelength λ3 is incident on the surface, Maximum kinetic energy becomes 4 eV. The work function of the metal is
- hcλ
- 2hcλ
- hc3λ
- hc2λ
Q.
Four students were doing the photoelectric experiment with lights having different wavelengths and intensities.
NameWavelength(nm)intensity(w/m2)RAM26320SATRA544120AVINASH674120HIMANSHU37265
If these four students are strong supporters of the classical wave model of light, then whose experiment will supposedly need the highest stopping potential?
Ram
Satra
Avinash
Himanshu
Q.
The wave theory of light predicted that the stopping potential for a conductor in photoelectric effect, ______________ on increasing the frequency of light. Intensity is kept constant.
Increases
decreases
Remains Same
I don't remember learning this part
Q. Wave theory predicts that the stopping potential for a conductor in photoelectric effect remains constant on increasing frequency of light.
- True
- False
Q. A beam of plane polarized light falls normally on a polarizer (cross-sectional area 3×10−4 m2) which rotates about the axis of the ray with an angular velocity of 31.4 rad/s. Find the energy of light E passing through the polarizer per revolution and the intensity Iavg of the emergent beam if the flux of energy of the incident ray is 10−3 W.
- E=10−3 J, Iavg=1.67 W/m2
- E=10−4 J, Iavg=1.67 W/m2
- E=10−4 J, Iavg=1.97 W/m2
- E=10−3 J, Iavg=1.97 W/m2