A plane electromagnetic wave with Eₘ=0.50 mV/m and frequency 5.0 MHz induces an emf in a square frame of side ℓ=50 cm in the orientation shown in the source figure. Which expression gives the induced emf?
Options

Question

A plane electromagnetic wave with Eₘ=0.50 mV/m and frequency 5.0 MHz induces an emf in a square frame of side ℓ=50 cm in the orientation shown in the source figure. Which expression gives the induced emf?

Options

G1 Physics · Accepted Answer

Integrating the electric field around the square loop for the shown orientation gives the net induced emf ε(ind)=25cos(ωt−π/3) mV, as in the source answer. Hence option A.