At a given point the electric field is 0.25 V/m. The energy flux at this point is A) 1.7 $\times$ 10^-4 W/m². B) 2.8 $\times$ 10^-4 W/m². C) 8.2 $\times$ 10^-4 W/m². D) 8.2 $\times$ 10^-5 W/m².

Question

Quizplus · Accepted Answer

Energy flux is given by the formula S = (1/2)ε₀E²v, where ε₀ is the permittivity of free space, E is the electric field strength, and v is the speed of light. Plugging in the given values, we get S = (1/2)(8.85 x 10^-12 F/m)(0.25 V/m)²(3 x 10^8 m/s) = 1.7 x 10^-4 W/m².

At a Given Point the Electric Field Is 0 ×\times× 10-4 W/m2

At a Given Point the Electric Field Is 0 $\times$ 10^-4 W/m²