Q. A particle has a mass 400 times than that of the electron and charge is double than that of a electron. It is accelerated by $5V$ of potential difference. Initially the particle was at rest, then its final kinetic energy will be
A) $5\ eV$
B) $10\ eV$
C) $100\ eV$
D) $2000\ eV$
Explanation
(b) $\mathrm{\Delta}E = 2e \times 5V = 10eV \Rightarrow$ Final kinetic energy $= 10eV$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.