The electric field in an electromagnetic wave is given by E=(50 NC−1)sin ω(t−xc).
Find the electrical energy contained in a cylinder of cross-section 10 cm2 and length 50 cm along the x-axis.
A 5.5×10⁻¹² J
B 1.1×10⁻⁸J
C 5×10⁻⁴J
D 1.1×10⁻¹²J