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Which of the following gives the value of magnetic field according to, Biot-Savart’s law'.
The correct answer is:
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Which of the following will have the least value of 
Which of the following will have the least value of
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One Tesla is equal to
One Tesla is equal to
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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
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The value of stopping potential in the following diagram
The value of stopping potential in the following diagram
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The intensity of X-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is 
and the wavelength of the 
line is 
. As the accelerating voltage is increased
The intensity of X-rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is and the wavelength of the line is . As the accelerating voltage is increased
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In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential 
. The work function of the photoelectric surface is given by (e is electronic charge)
In an experiment on photoelectric effect the frequency f of the incident light is plotted against the stopping potential . The work function of the photoelectric surface is given by (e is electronic charge)
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The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by
The stopping potential V for photoelectric emission from a metal surface is plotted along Y-axis and frequency n of incident light along X-axis. A straight line is obtained as shown. Planck's constant is given by
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For the photoelectric effect, the maximum kinetic energy 
of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives
For the photoelectric effect, the maximum kinetic energy of the emitted photoelectrons is plotted against the frequency n of the incident photons as shown in the figure. The slope of the curve gives
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The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let 
and 
be the intensities and 
and 
be the frequencies for the curves a, b and c respectively
The figure shows the variation of photocurrent with anode potential for a photo-sensitive surface for three different radiations. Let and be the intensities and and be the frequencies for the curves a, b and c respectively
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Which of the following figure represents the variation of particle momentum and the associated de-Broglie wavelength
Which of the following figure represents the variation of particle momentum and the associated de-Broglie wavelength
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In the following arrangement y = 1.0 mm, d= 0.24 mm and D = 1.2 m. The work function of the material of the emitter is 2.2 eV. The stopping potential V needed to stop the photo current will be
In the following arrangement y = 1.0 mm, d= 0.24 mm and D = 1.2 m. The work function of the material of the emitter is 2.2 eV. The stopping potential V needed to stop the photo current will be
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In order to coincide the parabolas formed by singly ionised ions in one spectrograph and doubly ionized ions in the other Thomson’s mass spectrograph, the electric fields and magnetic fields are kept in the ratios 1 : 2 and 3 : 2 respectively. Then the ratio of masses of the ions is
In order to coincide the parabolas formed by singly ionised ions in one spectrograph and doubly ionized ions in the other Thomson’s mass spectrograph, the electric fields and magnetic fields are kept in the ratios 1 : 2 and 3 : 2 respectively. Then the ratio of masses of the ions is
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A proton, a deutron and an a-particle having the same momentum, enters a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. Then the ratio of deflections suffered by them is
A proton, a deutron and an a-particle having the same momentum, enters a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. Then the ratio of deflections suffered by them is
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K1 wavelength emitted by an atom of atomic number Z = 11 is. Find the atomic number for an atom that emits K radiation with wavelength 4l
K1 wavelength emitted by an atom of atomic number Z = 11 is. Find the atomic number for an atom that emits K radiation with wavelength 4l
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Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube. K shell electrons of tungsten have ionization energy 72.5 keV. X-rays emitted by the tube contain only
Electrons with energy 80 keV are incident on the tungsten target of an X-ray tube. K shell electrons of tungsten have ionization energy 72.5 keV. X-rays emitted by the tube contain only
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