In an X-ray tube, cathode current is I, target distance is d and target potential is V above the cathode. The current is changed to 2I, the potential to 2V and the distance to d/2. Select the correct statements.
Select all that apply

Question

In an X-ray tube, cathode current is I, target distance is d and target potential is V above the cathode. The current is changed to 2I, the potential to 2V and the distance to d/2. Select the correct statements.

Select all that apply

G1 Physics · Accepted Answer

Step 1: For continuous X-rays use the Duane-Hunt relation λₘᵢₙ = hc/(eV). Step 2: For characteristic lines use the difference of shell binding energies or Moseley's law √ν ∝ (Z − b). Using the stated data gives A: Cut-off wavelength becomes half; characteristic wavelengths remain unchanged.; C: Cut-off wavelength becomes half and intensities of all X-rays decrease..