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A wire has a charge density of λ = –1.00 nC/m. The electric field for a...

A wire has a charge density of λ = –1.00 nC/m. The electric field for a line charge is given by ⃗E= λ 2πϵ0 r r.̂ (a) Find the potential difference ΔV between a point at a distance r and a point at the distance 2r from the centre of the wire. Give your answer in Volts. [10] (b) You release an electron from rest at the distance r from the wire. How fast is it moving at the distance of 2r? [10] Note: If you haven't completed (a), take ΔV = 10 V, which is the answer to (a) rounded to one significant figure

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