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Important Questions on Dual Nature of Matter and Radiation

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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 1
The stopping potential for photo electron emitted from a metal surface of work function 1.7 eV is 10.4V. Select correct choice
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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 2

The figure shows the results of an experiment involving photoelectric effect. The graphs A, B, C and D relate to a light beam having different wavelengths. Select the correct alternative

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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 3
When photons of energy 4.25 eV strike the surface of metal A, the ejected photoelectrons have maximum kinetic energy TA and de Broglie wavelength λA. The maximum kinetic energy of photoelectrons liberated from another metal B by photons of energy 4.70 eV is TB=TA×1.50 eV. If the de Broglie wavelength of these photoelectrons is λB=2λA, then
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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 4
In a photoelectric experiment, the collector plate is at 2.0 V with respect to the emitter plate made of copper (ϕ=4.5 eV). The emitter is illuminated by a source of monochromatic light of wavelength 200 nm. Then, choose the correct statement from the following.
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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 5
In photoelectric effect, stopping potential depends on
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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 6
If nr and nb are, respectively, the number of photons emitted by a red bulb and a blue bulb of equal power in a given time, then
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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 7
10-3 W of 5000 A∘ light is directed on a photoelectric cell. If the current in the cell is 0.16 μ, the percentage of incident photons which produce photoelectrons, is
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Beta Question Bank for Engineering: Physics>Chapter 32 - Dual Nature of Matter and Radiation>Exercise-2>Q 8
When a photon of light collides with a metal surface, number of electrons, (if any) coming out is