Electrostatics Question 421
Question: Distance of the point from A where the electric field is zero is [RPMT 2000]
Options:
A) 20 cm
B) 10 cm
C) 33 cm
D) None of these
Show Answer
Answer:
Correct Answer: C
Solution:
Suppose electric field is zero at N. Hence Which gives$ x _{1}=\frac{x}{\sqrt{\frac{Q _{2}}{Q _{1}}}+1}=\frac{80}{\sqrt{\frac{20}{10}+1}}=33cm $ .
