Light of wavelength 500 nm is incident on metal with work function 2.28 eV. The de-Broglie wavelength of the emitted electron is:
1. \(< 2.8\times 10^{-10}\) m
2. \(< 2.8\times 10^{-9}\) m
3. \(\geq 2.8\times 10^{-9}\) m
4. \(\leq 2.8\times 10^{-12}\) m
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyRadiation of energy 'E' falls normally on a perfectly reflecting surface. The momentum transferred to the surface is:
(c = velocity of light)
1. \(E \over c\)
2. \(2E \over c\)
3. \(2E \over c^2\)
4. \(E \over c^2\)
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following figures represent the variation of the particle momentum and the associated de-Broglie wavelength?
1. | 2. | ||
3. | 4. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhen the energy of the incident radiation is increased by 20%, the kinetic energy of the photoelectrons emitted from a metal surface increases from 0.5 eV to 0.8 eV. The work function of the metal is:
1. 0.65 eV
2. 1.0 eV
3. 1.3 eV
4. 1.5 eV
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIf the kinetic energy of the particle is increased to 16 times its previous value, the percentage change in the de-Broglie wavelength of the particle is :
1. 25
2. 75
3. 60
4. 50
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyFor photoelectric emission from certain metals, the cutoff frequency is . If radiation of frequency 2 impinges on the metal plate, the maximum possible velocity of the emitted electron will be:
(m is the electron mass)
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPrefer Books for Question Practice? Get NEETprep's Unique MCQ Books with Online Audio/Video/Text Solutions via Telegram Bot
NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyA 200 W sodium street lamp emits yellow light of wavelength 0.6 . Assuming it to be 25% efficient in converting electrical energy to light, the number of photons of yellow light it emits per second is
1.
2.
3.
4.
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyAn -particle moves in a circular path of radius 0.83 cm in the presence of a magnetic field of 0.25 Wb/m2. The de-Broglie wavelength associated with the particle will be :
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology