An infinitely long straight wire has a uniform linear charge density

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

2.0\times10^{-6}\,\text{C m}^{-1}

. Find the magnitude of the electric field at a point 5.0 cm from the wire. (Take

\varepsilon_0 = 8.85\times10^{-12}\,\text{C}^{2}\text{N}^{-1}\text{m}^{-2}

.) (a)

7.2\times10^{6}\,\text{N C}^{-1}

(b)

3.6\times10^{5}\,\text{N C}^{-1}

(c)

7.2\times10^{5}\,\text{N C}^{-1}

(d)

7.2\times10^{4}\,\text{N C}^{-1}