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} $



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