Physics-
General
Easy
Question
If light of wavelength is allowed to fall on a metal, then kinetic energy of photoelectrons emitted is . If wavelength of light changes to then kinetic energy of electrons changes to . Then work function of the metal is
The correct answer is:
E = W0 + KmaxÞ and
Þ and
Þ Þ
Related Questions to study
Physics-
Light of wavelength 2475 Å is incident on barium. Photoelectrons emitted describe a circle of radius 100 cm by a magnetic field of flux density Tesla. Work function of the barium is (Given
Light of wavelength 2475 Å is incident on barium. Photoelectrons emitted describe a circle of radius 100 cm by a magnetic field of flux density Tesla. Work function of the barium is (Given
Physics-General
Physics-
The figure shows different graphs between stopping potential and frequency (n) for photosensitive surface of cesium, potassium, sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be
The figure shows different graphs between stopping potential and frequency (n) for photosensitive surface of cesium, potassium, sodium and lithium. The plots are parallel. Correct ranking of the targets according to their work function greatest first will be
Physics-General
Physics-
An electron is moving through a field. It is moving (i) opposite an electric field (ii) perpendicular to a magnetic field as shown. For each situation the de-Broglie wave length of electron
An electron is moving through a field. It is moving (i) opposite an electric field (ii) perpendicular to a magnetic field as shown. For each situation the de-Broglie wave length of electron
Physics-General
Physics-
From the figure describing photoelectric effect we may infer correctly that
From the figure describing photoelectric effect we may infer correctly that
Physics-General
Physics-
In Thomson spectrograph experiment, four positive ions P,Q,R and S are situated on Y-X curve a shown in the figure
In Thomson spectrograph experiment, four positive ions P,Q,R and S are situated on Y-X curve a shown in the figure
Physics-General
Physics-
In a parabola spectrograph, the velocities of four positive ions P,Q,R and S are v1, v2, v3 and v4 respectively
In a parabola spectrograph, the velocities of four positive ions P,Q,R and S are v1, v2, v3 and v4 respectively
Physics-General
Physics-
The maximum value of stopping potential in the following diagram is
The maximum value of stopping potential in the following diagram is
Physics-General
Physics-
In the diagram a graph between the intensity of X-rays emitted by a molybdenum target and the wavelength is shown, when electrons of 30 keV are incident on the target. In the graph one peak is of line and the other peak is of line
In the diagram a graph between the intensity of X-rays emitted by a molybdenum target and the wavelength is shown, when electrons of 30 keV are incident on the target. In the graph one peak is of line and the other peak is of line
Physics-General
Physics-
The log-log graph between the energy E of an electron and its de-Broglie wavelength will be
The log-log graph between the energy E of an electron and its de-Broglie wavelength will be
Physics-General
Physics-
In the graph given below. If the slope is V-sec, then value of ‘h’ should be
In the graph given below. If the slope is V-sec, then value of ‘h’ should be
Physics-General
Physics-
The variation of wavelength of the line with atomic number Z of the target is shown by the following curve of
The variation of wavelength of the line with atomic number Z of the target is shown by the following curve of
Physics-General
Physics-
The dependence of the short wavelength limit on the accelerating potential V is represented by the curve of figure
The dependence of the short wavelength limit on the accelerating potential V is represented by the curve of figure
Physics-General
Physics-
The continuous x-ray spectrum obtained from a Coolidge tube is of the form
The continuous x-ray spectrum obtained from a Coolidge tube is of the form
Physics-General
Physics-
The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
The correct graph between the maximum energy of a photoelectron and the inverse of wavelength of the incident radiation is given by the curve
Physics-General
Physics-
The intensity distribution of X-rays from two coolidge tubes operated on different voltages V1 and V2 and using different target materials of atomic numbers Z1 and Z2 is shown in the figure. Which one of the following inequalities is true?
The intensity distribution of X-rays from two coolidge tubes operated on different voltages V1 and V2 and using different target materials of atomic numbers Z1 and Z2 is shown in the figure. Which one of the following inequalities is true?
Physics-General