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An electromagnetic wave of wavelength λ is incident on a photosensitive surface of negligible work function. If the photoelectrons emitted form this surface have de-broglie wavelength `λ_1` . Prove that

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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It is difficult to remove a free electron from copper than from sodium?

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Obtain the expression for the maximum kinetic energy of the electrons emitted from a metal surface in terms of the frequency of the incident radiation and the threshold

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For a given K.E. which of the following has the smallest de–broglie wavelength: electron, proton, α − particle

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Photoelectrons are emitted with a maximum speed of `7×10^5m`/`s` from a surface when light of frequency `8×10^(14)Hz` is incident on it. Find the threshold frequency for this

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Is photoelectric emission possible at all frequencies? Give reason for your

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Assume that the frequency of the radiation incident on a metal plate is greater than its threshold frequency. How will the following change, if the incident radiation is doubled?(1) Kinetic energy of electrons (2) Photoelectric

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Why are de – broglie waves associated with a moving football is not

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By how much would the stopping potential for a given photosensitive surface goup if the frequency of the incident radiations were to be increased from `4×10^(15) Hz` to `8 × 10^(15) Hz? ` `(h=6.4xx10^(-3)4Js,

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Work function of Na is 2.3eV. Does sodium show photoelectric emission for light on the velocity of

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An electron and an alpha particle have the same debroglie wavelength associated with them? How are their kinetic energies related to each

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An α − particle and a proton are accelerated from rest through same potential difference V. find the ratio of de–broglie wavelength associated with

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A free proton and a free electron are placed in a uniform field. Which of the two experience greater force and greater

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No two electric lines of force can intersect each other?

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The graph shows the variation of voltage V across the plates of two capacitors A and B versus increase of charge Q stored on them. Which of the two capacitors have higher capacitance? Give reason for your answer?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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An electric dipole when held at `30^0` with respect to a uniform electric field of `10^4 N/C` experienced a Torque of `9 x 10^(-26) Nm`. Calculate dipole moment of the

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Show mathematically that the potential at a point on the equatorial line of an electric dipole is

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A parallel plate capacitor with air between the plates has a capacitance of 8 pF `(1pF = 10^(-12) F)`. What will be the capacitance if the distance between the plates is reduced by half and the space between them is filled with a substance of dielectric constant

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Draw one equipotential surfaces (1) Due to uniform electric field (2) For a point charge (q <

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If the amount of electric flux entering and leaving a closed surface are `phi_1` and `phi_2` respectively. What is the electric charge inside the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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