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Earn 100
An -ray tube when operated at then reading of tube current is . Assuming that the total energy of electron is converted into heat, the rate of heat produced at the anode in calories/sec is about :-
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Important Questions on Atomic Physics
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The wavelength of -line characteristic X-rays e mitted by an element is 0.32 Å. The wavelength of -line emitted by the same element will be :-
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The ionisation energies of K-shell for cobalt, copper, and molebdenum are 7.8, 9.0 and 20.1 keV respectively. If any metal out of these is used as target in an X-ray tube operated at 15 KV, then:-
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The potential difference applied to an X-ray tube is increased. As a result, in the emitted radiation :-
(a) the intensity increases
(b) the minimum wavelength increases
(c) the intensity remains unchanged
(d) the minimum wavelength decreases
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In producing X-rays a beam of electrons accelerated by a potential difference V is made to strike a metal target. For what value of V of the following X-rays have the lowest wavelength of 0.3094 angstrom.
HARD
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The wavelength of the -rays produced by an -ray tube is . The atomic number of anode material is
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Energy levels of a certain atom corresponding to increasing values of energy are such that If are the
wavelengths of radiations corresponding to the transitions to to and to respectively, which of the following statements is correct?
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What is the approximate ratio of wavelength of radiation when atomic number of first target is Z1 = 64 and atomic number of second target is Z2 = 80 :-
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The ionization potential of the hydrogen atom is 13.6 V. The energy needed to ionize a hydrogen atom which is in its first excited state is about
