Mathematics · Gauss Law
A long, straight wire is surrounded by a hollow metal cylinder whose axis coincides with that of the wire. The wire has a charge per unit length of λ, and the cylinder has a net charge per unit length of 2λ. Using Gauss's law, find the electric field outside the cylinder at a distance r from the axis.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 12λ2πε0r radially inward
- 23λ2πε0r radially outward✓
- 33λ2πε0r radially inward
- 42λ2πε0r radially outward
Correct answer
3λ2πε0r radially outward
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