Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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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. - Physics

ConceptElectromagnetic Spectrum

#### Question

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 the aluminium foil that will allow 50% of the X-ray to pass through will be

• zero

• < 0.1 mm

• 0.1 mm

• > 0.1 mm

#### Solution

> 0.1 mm

As we increase the accelerating potential between the filament and the target, the penetrating power of the X-ray will increase. As a result, the fraction of the X-ray passing through the foil will increase. But it is given that the same fraction of the X-ray is passing. Therefore, the thickness of the aluminium foil should be increased to maintain the same fraction of the X-ray that will pass through the foil.

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Solution 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. Concept: Electromagnetic Spectrum.
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