Question

When Hertzian dipole is connected to a practical antenna, which of the following fields is observed to be absent when a uniform current flow is observed?

(a) Radiation field

(b) Induction field

(c) Electrostatic field

(d) Both radiation and Induction Field

This question was posed to me in an internship interview.

I'd like to ask this question from Radiation topic in section Radiation, Baluns & Polarization of Antennas

Answer 1

Correct choice is (c) Electrostatic field

Explanation: Since a constant current flow and there is no any charge accumulation at the ends of the dipole, the term 1/r^3disappears. Therefore, electrostatic field is absent.