NEET 2021 Model Test Paper 3

Question : 12 of 180

Marks: +1, -0

An X-ray tube is operated at a constant potential difference and it is required to get X-rays of wavelength not less than 0.2 nanometres. Then the potential difference in kilovolts is :
( h=6.63×10−34J−s,e=1.6×10−19 coulomb, c = 3 × 10‌8 m/s)