NEET Last 32 Years Solved 1988 – 2019 Physics and Chemistry Video Solutions
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Photons with energy 5eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is
21
Aug
Photons with energy 5eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C, no photoelectrons will reach the anode A, if the stopping potential of A relative to C is energy of emitted photoelectrons is 2eV. [...]
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Chapter 29 - Dual Nature of Matter and Radiation
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NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
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if the stopping potential of A relative to C is ,
if the stopping potential of A relative to C is energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C ,
no photoelectrons will reach the anode A ,
Photons with energy 5eV are incident on a cathode C in a photoelectric cell . The maximum energy of emitted photoelectrons is 2eV. When photons of energy 6eV are incident on C ,
When a metallic surface is illuminated with radiation of wavelength λ the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is V/4. the threshold wavelength for the metallic surface is.
21
Aug
When a metallic surface is illuminated with radiation of wavelength λ the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is V/4. the threshold wavelength for the metallic surface is. the stopping potential is V/4. the threshold wavelength for the metallic surface is When a [...]
The photoelectric threshold wavelength of silver is 3250×10^−10m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10−10m is : (Given h=4.14×10−15eVs and c=3×108ms−1)
21
Aug
The photoelectric threshold wavelength of silver is 3250×10^−10m. The velocity of the electron ejected from a silver surface by ultraviolet light of wavelength 2536×10−10m is : (Given h=4.14×10−15eVs and c=3×108ms−1) August 21, 2020 Category: Chapter 29 - Dual Nature of Matter and Radiation , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry [...]
Light with an energy flux of 25 × 10^4 Wm^−2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15cm2, the average force exerted on the surface is
21
Aug
Light with an energy flux of 25 × 10^4 Wm^−2 falls on a perfectly reflecting surface at normal incidence. If the surface area is 15cm2, the average force exerted on the surface is Light with an energy flux of 25 × 10^4 Wm^−2 falls on a perfectly reflecting surface at normal incidence. If the surface [...]
The Young’s modulus of steel is twice that of brass. Two wires of sample length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to the steel and brass wires must be in the ratio of
21
Aug
The Young’s modulus of steel is twice that of brass. Two wires of sample length and of same area of cross section, one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level, then the weights added to [...]
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Chapter 32 - Ray Optics
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NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions
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Physics
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one of steel and another of brass are suspended from the same roof. If we want the lower ends of the wires to be at the same level ,
The Young's modulus of steel is twice that of brass. Two wires of sample length and of same area of cross section ,
then the weights added to the steel and brass wires must be in the ratio of ,
Pick the wrong answer in the context with rainbow.
21
Aug
Pick the wrong answer in the context with rainbow. Pick the wrong answer in the context with rainbow. August 21, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - 2019 Physics and Chemistry Video Solutions , Physics ,
Unpolarised light is incident from air on a plane surface of a material of refractive index ′μ′. At a particular angle of incidence ′I′ , it is found that then reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation?
21
Aug
Unpolarised light is incident from air on a plane surface of a material of refractive index ′μ′. At a particular angle of incidence ′I′ , it is found that then reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation? it is found that then reflected [...]
Match the corresponding entries of column 1 with column 2. (where m is the magnification produced by the mirror)
21
Aug
Match the corresponding entries of column 1 with column 2. (where m is the magnification produced by the mirror) Match the corresponding entries of column 1 with column 2. (where m is the magnification produced by the mirror) August 21, 2020 Category: Chapter 32 - Ray Optics , NEET Last 32 Years Solved 1988 - [...]
Two Polaroids P1 and P2 are placed with their axis perpeTwo Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45 degree with that of P1. The intensity of transmitted light through P2 isndicular to eachother. Unpolarised light I0 is nicident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45 degree with that of P1. The intensity of transmitted light through P2 is
21
Aug
Two Polaroids P1 and P2 are placed with their axis perpeTwo Polaroids P1 and P2 are placed with their axis perpendicular to each other. Unpolarised light I0 is incident on P1. A third polaroid P3 is kept in between P1 and P2 such that its axis makes an angle 45 degree with that of P1. [...]
In Young’s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1 = 12000 A and λ2 = 10000 A. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide with a bright fringe from the other?
21
Aug
In Young’s double slit experiment, the slits are 2 mm apart and are illuminated by photons of two wavelengths λ1 = 12000 A and λ2 = 10000 A. At what minimum distance from the common central bright fringe on the screen 2 m from the slit will a bright fringe from one interference pattern coincide [...]