Join the Most Relevant JEE Main 2025 Test Series & get 99+ percentile! Join Now
Search any question & find its solution
Question: Answered & Verified by Expert

An infinite number of point charges, each carrying 1 μC charge, are placed along the y-axis at y=1 m,2 m,4 m,8 m ... .

The total force on a 1 C point charge, placed at the origin, is x×103 N. The value of x, to the nearest integer, is ___ .

[Take 14πϵ0=9×109 N m2 C-2]

PhysicsElectrostaticsJEE MainJEE Main 2021 (18 Mar Shift 2)
Solution:
1035 Upvotes Verified Answer
The correct answer is: 12

F=k1 C1 μC1+122+142+182+

=9×10311-14=12×103 N

Looking for more such questions to practice?

Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.