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NEET UG CHEMISTRY MCQ: STRUCTURE OF ATOM
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When the frequency of light incident on a metallic plate is doubled, the KE of the emitted photoelectrons will be:
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Correct option: C
Increased but more than doubled of the previous KE
Option C (Increased but more than doubled of the previous KE) is correct because the kinetic energy is related to the frequency by , where W is the work function. Doubling the frequency does not simply double the kinetic energy.
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Reason: The oscillating electric and magnetic fields produced by oscillating charged particles are parallel to each other and both are perpendicular to the direction of propagation of the wave. S-I: The orbital has maximum electron density along the y axis and its nodal plane is xz plane.
S-II : For a given atom, for all values of , the -orbitals have the same shape, but the overall size decreases as '' increases. S-I: Elements like and were discovered when their minerals were analysed by spectroscopic methods.
S-II: The element helium was discovered in the sun by spectroscopic method. In which one of the following, the number of protons is greater than number of neutrons but number of protons is less than the number of electrons?