Electrostatics Question 410
Question: Three identical point charges, are placed at the vertices of an isosceles right angled triangle. Which of the numbered vectors coincides in direction with the electric field at the mid-point M of the hypotenuse [AMU 2000]
Options:
A) 1
B) 2
C) 3
D) 4
Show Answer
Answer:
Correct Answer: B
Solution:
$ E _{A} $ = Electric field at M due to charge placed at A $ E _{B} $ = Electric field at M due to charge placed at B $ E _{C} $ = Electric field at M due to charge placed at C , $ |\overrightarrow{E _{B}}|=|\overrightarrow{E _{C}}|, $ so net electric field at M, $ E _{net}=E _{A}; $ in the direction of vector 2.
