Electrostatics Question 512
Question: If an electron moves from rest from a point at which potential is 50 volt to another point at which potential is 70 volt, then its kinetic energy in the final state will be [J & K CET 2005]
Options:
A) 3.2 × 10?10 J
B) 3.2 × 10?18 J
C) 1 N
D) 1 dyne
Show Answer
Answer:
Correct Answer: B
Solution:
$ \text{K}\text{.E}\text{.}=q _{0}(V _{A}-V _{B})=1.6\times {{10}^{-19}}(70-50)=3.2\times {{10}^{-18}}J $
