• Support PF! Buy your school textbooks, materials and every day products Here!

Electric Field- Infinitely long lines of charge

  • Thread starter binbagsss
  • Start date
1,188
8
Two very long uniform lines of charge are parallel and seperated by 0.3m. Each line of charge has charge per unit length: +5.20*10^-6. What is the magnitude of the force that one charge exerts on a 0.0500m section of the other line of charge?

My Attempt

Standard formula for the E field of an infinite line charge is :λ /2πΣσr

F=E*Q
E = 5.20*10^-6/2π*8.85*10-12*0.3
Q(of this section)= 5.20*10^-6*0.05

=> F = EQ = 0.0810 N

However the correct answer is , 4.05*10^-3 N

Cheers Guys =]
 

Answers and Replies

203
0
http://theory.uwinnipeg.ca/physics/mag/node10.html

current induces magnetic field
B = uI/(2*pi*r)
the force experienced by a moving charge is IxB
F = IxB
that current crossed with magnetic field
so the current from 1 is crossed with the current from 2
 

Related Threads for: Electric Field- Infinitely long lines of charge

Replies
21
Views
1K
Replies
1
Views
3K
Replies
3
Views
2K
Replies
2
Views
1K
Replies
1
Views
6K
Replies
4
Views
10K
Top