X-Rays
Physics ⇒ Modern Physics
X-Rays starts at 11 and continues till grade 12.
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See sample questions for grade 11
A crystal diffracts X-rays of wavelength 0.154 nm at a glancing angle of 30°. Calculate the spacing between the crystal planes (n = 1).
Calculate the minimum wavelength of X-rays produced when electrons are accelerated through a potential difference of 50,000 V. (Take h = 6.63 × 10-34 J·s, c = 3.0 × 108 m/s, e = 1.6 × 10-19 C)
Describe one industrial application of X-rays.
Describe the difference between hard X-rays and soft X-rays.
Describe the role of the anode in an X-ray tube.
Explain the basic principle of X-ray production in an X-ray tube.
Explain the term 'X-ray fluorescence'.
Explain why X-rays are called 'ionizing radiation'.
Which of the following correctly describes the speed of X-rays in a vacuum? (1) Less than the speed of light (2) Equal to the speed of light (3) Greater than the speed of light (4) Zero
Which of the following factors increases the intensity of X-rays produced in an X-ray tube? (1) Increasing the filament current (2) Decreasing the anode voltage (3) Using a lower atomic number target (4) Reducing the vacuum
Which of the following is a characteristic property of X-rays? (1) They are deflected by magnetic fields (2) They can cause fluorescence (3) They have a positive charge (4) They travel slower than light
Which of the following is a correct statement about characteristic X-rays? (1) They are produced by deceleration of electrons (2) Their energy depends on the target material (3) They have a continuous spectrum (4) They are not used in medical imaging
Fill in the blank: The absorption of X-rays by a material depends on its ________ and thickness.
Fill in the blank: The energy of an X-ray photon is given by E = ________.
Fill in the blank: The process of using X-rays to obtain images of the internal structure of objects is called ________.
Fill in the blank: The process of X-ray production due to deceleration of electrons is called ________.
State whether the following statement is true or false: X-rays can be deflected by electric and magnetic fields.
State whether the following statement is true or false: X-rays can be focused using lenses similar to those used for visible light.
State whether the following statement is true or false: X-rays can be used to detect cracks in metal structures.
State whether the following statement is true or false: X-rays can cause ionization of atoms.
