Electrostatics Question 397
Question: An oil drop having charge is kept stationary between two parallel horizontal plates 2.0 cm apart when a potential difference of 12000 volts is applied between them. If the density of oil is , the radius of the drop will be [AMU 1999]
Options:
A)
B)
C)
D)
Show Answer
Answer:
Correct Answer: B
Solution:
In equilibrium QE = mg therefore
therefore
therefore