An X-ray tube operates on 30 kV. What is the minimum wavelength emitted \[(h=6.6\times {{10}^{-34}}\]Js, \[e=1.6\times {{10}^{-19}}\]Coulomb, \[c=3\times {{10}^{8}}\]ms?1) [MP PMT 1995; DPMT 2001, 03]

• A. 0.133 Å
• B. 0.4 Å
• C. 1.2 Å
• D. 6.6 Å