Cutoff wavelength of X-rays coming from a Coolidge tube depends on the
(a) target material
(b) accelerating voltage
(c) separation between the target, and the filament
(d) temperature of the filament
Choose the correct option
1. (a), (b)
2. (b)
3. (c), (d)
4. (a), (d)
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When an electron strikes the target in a Coolidge tube, its entire kinetic energy
(a) is converted into a photon
(b) may be converted into a photon
(c) is converted into heat
(d) may be converted into heat
Choose the correct option
1. (a), (b)
2. (b), (c)
3. (b), (d)
4. (a), (d)
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X-ray incident on a material
(a) exerts a force on it
(b) transfers energy to it
(c) transfers momentum to it
(d) transfers impulse to it
Choose the correct option
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. All of these
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Consider a photon of continuous X-ray and a photon of characteristic X-ray of the same wavelength. Which of the following are different for the two photons?
(a) frequency
(b) energy
(c) penetrating power
(d) method of creation
Choose the correct option
1. (a), (b)
2. (b), (c)
3. (d)
4. (a), (d)
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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
Choose the correct option
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (d)
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For harder X-rays,
(a) the wavelength is higher
(b) the intensity is higher
(c) the frequency is higher
(d) the photon energy is higher
Choose the correct option
1. (a), (b)
2. (b), (c)
3. (c), (d)
4. (a), (d)
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Visible light passing through a circular hole forms a diffraction disc of radius 0.1 mm on a screen. If X-ray is passed through the same set-up, the radius of the diffraction disc will be
1. zero
2. < 0.1 mm
3. 0.1 mm
4. > 0.1 mm
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X-ray from a Coolidge tube is incident on a thin aluminium foil. The intensity of the X-ray transmitted by the foil is found to be I0. The heating current is increased so as to increase the temperature of the filament. The intensity of the X-ray transmitted by the foil will be.
1. zero
2. < I0
3. I0
4. > I0
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50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1 mm thick aluminium foil. The potential difference between the target and the filament is increased. The thickness of aluminium foil, which will allow 50% of the X-ray to pass through, will be
1. zero
2. < 0.1 mm
3. 0.1 mm
4. > 0.1 mm
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50% of the X-ray coming from a Coolidge tube is able to pass through a 0.1 mm thick aluminum foil. If the potential difference between the target and the filament is increased, the fraction of the X-ray passing through the same foil will be
1. 0%
2. < 50%
3. 50%
4. > 50%
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