Antenna and Wave Propagation Quiz

An electronic device that converts electrical signals into electromagnetic waves (for transmission) and vice versa (for reception). It's essentially a bridge between electrical circuits and free space.

The range of frequencies over which an antenna performs efficiently. It's the bandwidth where the antenna can effectively transmit or receive signals.

A measure of how well an antenna matches the impedance of the transmission line. A good match ensures efficient power transfer between the antenna and the source or receiver.

The work done per unit charge to move a positive test charge from infinity to a point in an electric field. It's a scalar quantity.

The work done per unit charge to move a positive test charge from infinity to a point in an electric field. It's a scalar quantity.

A vector field that describes the magnetic influence of electric currents and magnetic materials. Potential energy per unit magnetic pole.

A fundamental law in electromagnetism that describes the magnetic field generated by a steady electric current. It relates the magnetic field to the magnitude, direction, length, and proximity of the current.

A set of equations that describe the relationship between electric and magnetic fields and their sources, namely charges and currents. They form the foundation of classical electromagnetism.

A field that describes the force exerted on a charged particle at a given point in space, due to the influence of other charged particles. It's a vector field.

A field that describes the force exerted on a moving charged particle in a magnetic field. It's a vector field.

The rate of change of magnetic flux through a surface. It's a measure of how fast the magnetic field is changing.

Retarded potentials are solutions to Maxwell’s equations that are valid for the case of time-varying electromagnetic fields. They are referred to as “retarded” because they depend on the values of the sources at some earlier time. These potentials are used to calculate the electromagnetic fields generated by charges and currents that are moving or changing with time.

The study of magnetic fields that are not changing with time. They are described by static magnetic fields.

The study of electric fields that are not changing with time, caused by stationary charges.

A fundamental law in electrostatics which describes the force between two stationary charged particles. It states that the force between two stationary charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

A circuit law that relates the magnetic field around a closed loop to the current enclosed by the loop. It states that the line integral of the magnetic field around a closed loop is equal to the product of the permeability of free space and the current enclosed by the loop.

A mathematical theorem that relates the flux of a vector field through a closed surface to the divergence of the field within the surface. It states that the flux of a vector field through a closed surface is equal to the volume integral of the divergence of the field over the enclosed volume.

The process of transferring electromagnetic energy from one point to another using electromagnetic waves. It's a fundamental aspect of communication, broadcasting, and sensing.

The process of transferring electromagnetic energy from one point to another using electromagnetic waves.

The bending of electromagnetic waves as they pass from one medium to another, due to changes in the speed of light.

The scattering of electromagnetic waves by objects or particles that are smaller than the wavelength of the radiation.

The loss of electromagnetic wave energy as the waves travel through a medium. It can be caused by absorption, reflection, or scattering.

A phenomenon that occurs when electromagnetic waves encounter a sharp edge or obstacle, causing the waves to bend around the obstacle.

The phenomenon that occurs when two or more electromagnetic waves meet at a point in space. The waves can interfere constructively, resulting in an increase in amplitude, or destructively, resulting in a decrease in amplitude.

The polarization of an electromagnetic wave refers to the orientation of the electric field vector. It's related to the direction in which the electric field oscillates.

The length of one cycle of an electromagnetic wave. It's a measure of how much distance is covered by one complete oscillation of the wave.

The frequency of an electromagnetic wave refers to the number of complete cycles per second. It's a measure of how fast the electric and magnetic fields oscillate.

A wave that propagates through a medium with a speed that is independent of the frequency of the wave. In this type of wave, all frequencies travel at the same speed.

A wave that propagates through a medium with a speed that depends on the frequency of the wave.

The speed of an electromagnetic wave in a vacuum. It's a fundamental constant in physics, and it's approximately 299,792,458 meters per second.

The bending of electromagnetic waves around obstacles. This phenomenon occurs when waves encounter a sharp edge or a narrow opening.

The interference of two or more electromagnetic waves that can lead to the superposition of the waves, resulting in a combined wave that can have a higher, lower, or similar amplitude.