1.

The visible portion of a lightning strike is preceded by an invisible stage in which a column of electrons extends downward from a cloud to the ground Assume the linear chargedensity along the column is 1.00xx10^(-3)C//m Treat the column of charge as if it were straight and infinitely long. At what distance (in m) from the column of electrons does the electric field havea magnitude of 3.00xx10^(6) V//m the dielectric strength for air? This is an estimate of the radius of a visible lightning bolt. (Round off to nearest integer) (value of in_(0)is 8.85xx10^(-12) C^(2)//Nm^(2))

Answer»


SOLUTION :`lambda/(2pi in_(0)R)=E_(break)`
`r=lambda/(2piin_(0)E_(break))`
`=10^(-3)/(2xx3.14xx8.85xx10^(-12)xx3xx10^(6))`
`=1/(2xx3.14xx8.85)xx10^(3)`
`=5.99m APPROX 6m`


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