Question

A proton is accelerated through $50,000V$. Its energy will increase by

• A. 5000 eV
• B. $8\times 10^{-15}J$
• C. 5000 J
• D. 50,000 J

Answer 1

Answer: (B)

Kinetic energy $K=Q.V$
$\Rightarrow K=(+e)(50000V)$
$=50000eV=50000\times 1.6\times 10^{-19}J$
$=8\times 10^{-15}J$