An electron is accelerated from rest through a potential difference V. This electron experiences of force F in a uniform magnetic field. On increasing the potential difference to V′, the force experienced by the electron in the same magnetic field becomes 2F. Then, the ratio VV′​ is equal to

A

14​

B

12​

C

21​

D

41​

Mayank Ranka , 5 Years ago

Grade 12th pass