Find the electric field intensity at (6, 8, 3) m if a uniform line charge density ρL = 20 nC/m lies along the z-axis.

A linear accelerator uses RF (radio frequency) electric fields to accelerate electrons. If the frequency of the RF field is 3 GHz and the phase velocity of the wave is equal to the speed of light (approximately 3 × 108 m/s), what is the wavelength of the RF field?

Given a coaxial cable with a characteristic impedance of 75 Ω, an inner conductor diameter of 1.5 mm, and a dielectric constant of 2.0, calculate the outer conductor diameter.