Q116. The potential difference between the target and cathode of an X-ray tube is 20 kV and the current is 20 mA. What is the λmin of the emitted X-ray? Physics — NUST Mock 1 — Question 116 of 200A. 6.19 x 10-4 mB. 6.19 x 10-14 m C. 6.19 x 10-11 m D. 6.19 x 10-19 m Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →