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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 =]
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 =]