The electric field radiated from an antenna is produced by which electrical property?

The correct answer is based on the relationship between current flow and the generation of electromagnetic fields. An antenna radiates an electric field when an alternating current flows through it. This alternating current generates time-varying electric and magnetic fields, which combine to form electromagnetic waves that propagate away from the antenna.

While voltage is a crucial parameter in the context of antennas, the actual radiation and characteristics of the electric field are predominantly influenced by the current. The current is what creates the changing electric and magnetic fields in space, leading to the propagation of radio waves.

Although other properties like capacitance, impedance, and voltage play roles in antenna design and performance, they do not directly induce the electric field radiated. Capacitance and impedance relate more to how an antenna interacts with the feedline and the signals, while voltage is related to the potential across the antenna rather than the direct creation of the radiated field. Thus, the magnetic field produced by current is fundamental in understanding antenna radiation.