Q. The binding energy of the innermost electron in tungsten is $40\ keV.$ To produce characteristic $X$-rays using a tungsten target in an $X$-rays tube the potential difference $V$ between the cathode and the anti-cathode should be
A) $V < 40\ kV$
B) $V \leq 40\ kV$
C) $V > 40\ kV$
D) $V > / < 40\ kV$
Explanation
(c) Applied voltage must be greater than binding enegy
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.