Which two basic fields are associated with every antenna?

Which two basic fields are associated with every antenna?

• A. Induction and Radiation
• B. Electric and Magnetic
• C. Capacitive and Inductive
• D. Transmit and Receive

Answer: (A)

Two basic fields associated with every antenna are the electric and magnetic fields. When an antenna carries time-varying current, it creates changing electric fields, and those in turn generate changing magnetic fields; together they form the electromagnetic wave that radiates away and can be received by another antenna. Induction describes how changing magnetic flux can drive current, and radiation describes energy leaving as EM waves—these are processes, not the fundamental fields themselves. Capacitive and inductive refer to energy storage and reactance in circuits, not the fields around the antenna. Transmit and receive describe what the device does, not the fields that make up the wave.

Two basic fields associated with every antenna are the electric and magnetic fields. When an antenna carries time-varying current, it creates changing electric fields, and those in turn generate changing magnetic fields; together they form the electromagnetic wave that radiates away and can be received by another antenna. Induction describes how changing magnetic flux can drive current, and radiation describes energy leaving as EM waves—these are processes, not the fundamental fields themselves. Capacitive and inductive refer to energy storage and reactance in circuits, not the fields around the antenna. Transmit and receive describe what the device does, not the fields that make up the wave.