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The figure below shows the essential components of an x-ray tube a)Name the parts labelled A and B. b)Explain how electrons are produced. c)During the operation of the...

      

The figure below shows the essential components of an x-ray tube
fig56301020191612.png
a)Name the parts labelled A and B.
b)Explain how electrons are produced.
c)During the operation of the tube, the target becomes very hot.
i)Explain how this heat is caused.
ii)State any two ways in which cooling can be achieved.
d)Explain why:
i)The tube is evacuated.
ii)The cathode is concave shaped.

  

Answers


Kavungya
a) A- Tungsten target.
B - Electron beam OR Cathode rays
b) When a current flows through the filament in the cathode, the cathode is heated up and electrons are produced by thermionic emission
c) i) Most of the kinetic energy of the electrons is converted to heat the target.
ii) - Anode is made of good conductor of heat to ensure efficient dissipation of heat.
- Presence of cooling fins.
- Circulation of oil through the channel in the copper block.
d) i) So that electrons do not lose some of their energy through collisions with air molecules.
(ii) To focus the electrons beam onto the target.
Kavungya answered the question on October 30, 2019 at 13:14


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