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Subject - Physics:

Basics

MCQ - 90-10557

Question:

The penetrating power of X-rays can be increased by

  1. Increasing the current in the filament
  2. Decreasing the current in the filament
  3. Increasing the potential difference between the cathode and the anode
  4. Decreasing the current in the filament

Correct Answer: C

Explanation:

Increasing the potential difference increases the frequency of the x-rays. X-rays and gamma rays with shorter wavelengths will have more energy that must be absorbed and, therefore, more energy will make it deeper into the material or through the material.

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