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Consider the situation shown in figure. If the closed loop is completely enclosed in the circuit containing the switch, the closed loop will show _______________ .
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A small piece of cesium metal (φ = 1.9 eV) is kept at a distance of 20 cm from a large metal plate with a charge density of 1.0 × 10−9 C m−2 on the surface facing the cesium piece. A monochromatic light of wavelength 400 nm is incident on the cesium piece. Find the minimum and maximum kinetic energy of the photoelectrons reaching the large metal plate. Neglect any change in electric field due to the small piece of cesium present.
(Use h = 6.63 × 10-34J-s = 4.14 × 10-15 eV-s, c = 3 × 108 m/s and me = 9.1 × 10-31kg)
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The figure is the plot of stopping potential versus the frequency of the light used in an experiment on photoelectric effect. Find (a) the ratio h/e and (b) the work function.
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When a Coolidge tube is operated for some time it becomes hot. Where does the heat come from?
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In a Coolidge tube, electrons strike the target and stop inside it. Does the target get more and more negatively charged as time passes?
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Can X-rays be used for photoelectric effect?
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Can X-rays be polarised?
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X-ray and visible light travel at the same speed in vacuum. Do they travel at the same speed in glass?
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Characteristic X-rays may be used to identify the element from which they are being emitted. Can continuous X-rays be used for this purpose?
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Is it possible that in a Coolidge tube characteristic Lα X-rays are emitted but not Kα X-rays?
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Can Lα X-ray of one material have shorter wavelength than Kα X-ray of another?
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Can a hydrogen atom emit characteristic X-rays?
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Why is exposure to X-rays injurious to health but not exposure to visible light, when both are electromagnetic waves?
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An X-ray beam can be deflected
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Consider a photon of a continuous X-ray coming from a Coolidge tube. Its energy comes from
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The energy of a photon of a characteristic X-ray from a Coolidge tube comes from
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If the potential difference applied to the tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength
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If the current in the circuit for heating the filament is increased, the cutoff wavelength
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Moseley's Law for characteristic X-ray is √v = a(Z − b). Here,
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Frequencies of Kα X-rays of different materials are measured. Which one of the graphs in the figure may represent the relation between the frequency v and the atomic number Z ?
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