What is the line charge density on a long wire if the electricfield 46 cm from t

Question

What is the line charge density on a long wire if the electricfield 46 cm from the wire has magnitude245 kN/C and points toward thewire?
This is really confusing me guys.. I got some help on itearlier but am still being told I am incorrect... got somethinglike 6.266.. Thanks in advance! What is the line charge density on a long wire if the electricfield 46 cm from the wire has magnitude245 kN/C and points toward thewire?
This is really confusing me guys.. I got some help on itearlier but am still being told I am incorrect... got somethinglike 6.266.. Thanks in advance!

Explanation / Answer

The E field from a line charge is: .         E = 2 k / r     where     is what we want to solve for . = E r / 2 k = 245000 *0.46 / 2 * 8.99 x 109 = .          =  6.268 x10-6 Coulomb / meter   butNEGATIVE because the E field points toward the wireso .               - 6.268 C / m

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