Practice question

**Hertz experiment** used induction coil connected to two rods with gap, spark produced oscillating charge, emitted EM wave, received by loop with gap sparking when E induced, measured wavelength by standing wave, demonstrated EM wave properties, validating Maxwell. Maxwell introduced displacement current to account for the magnetic field produced by a time-varying electric field, ensuring consistency in Ampere's circuital law when applied to capacitors. Using c = fλ, E₀/B₀ = c, I_d = ε₀ dΦ_E/dt, and spectrum classification λ = c/f, evaluation yields It produces a magnetic field due to a changing electric field, illustrating EM wave transverse nature and Maxwell's displacement current concept.