Electrostatics Question 348
Question: The intensity of electric field required to balance a proton of mass $ 1.7\times {{10}^{-27}}kg $ and charge$ 1.6\times {{10}^{-19}}C $ is nearly
Options:
A) $ 1\times {{10}^{-7}}\ V/m $
B) $ 1\times {{10}^{-5}}\ V/m $
C) $ 1\times 10^{7}\ V/m $
D) $ 1\times 10^{5}\ V/m $
Show Answer
Answer:
Correct Answer: A
Solution:
Since qE = mg or $ E=\frac{mg}{q}=\frac{1.7\times {{10}^{-27}}\times 9.8}{1.6\times {{10}^{-19}}} $
$ =10.0\times 10^{8}=1\times 10^{7}V/m $
