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?(adsbygoogle = window.adsbygoogle || []).push({});

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 =]

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# Homework Help: Electric Field- Infinitely long lines of charge

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