Electrostatics Question 709

Question: N identical point charges are kept summetrically on the periphery of the circle x2+y2=R2 in xy plane. The resultant electric field at (0, 0, R) is E1 and at (0, 0, 2R) is E2 . The ratio of E1E2 is

Options:

A) 5542

B) 52

C) 54

D) 5522

Show Answer

Answer:

Correct Answer: A

Solution:

[a] E1=nkQR(R2+R2)3/2,E1=nkQ(2R)(R2+(2R)2)3/2

E1E2=5542



जेईई के लिए मॉक टेस्ट

एनसीईआरटी अध्याय वीडियो समाधान

दोहरा फलक