Electrostatics Question 487
Question: A charged particle is suspended in equilibrium in a uniform vertical electric field of intensity 20000 V/m. If mass of the particle is $ 9.6\times {{10}^{-16}}kg $ , the charge on it and excess number of electrons on the particle are respectively $ (g=10m/s^{2}) $ [Pb. PMT 2003]
Options:
A) $ 4.8\times {{10}^{-19}}C,3 $
B) $ 5.8\times {{10}^{-19}}C,4 $
C) $ 3.8\times {{10}^{-19}}C,2 $
D) $ 2.8\times {{10}^{-19}}C,1 $
Show Answer
Answer:
Correct Answer: C
Solution:
Potential inside the conducting sphere is same as that of surface i.e. $ \frac{Q}{4\pi {\varepsilon _{0}}R} $
