# In conductors which two parameters are same?

**Asked by: Amara Breitenberg**

Score: 4.7/5 (8 votes)

In conductors, which two parameters are same? Explanation: In conductors, which are considered to be lossy, **the attenuation and the phase constant are the same**.

Likewise, Can EM waves propagate in conductor?

, that is known as the skin-depth. Consequently, an electromagnetic wave

**cannot penetrate more than a few skin-depths into a conducting medium**. This implies that high frequency waves penetrate a shorter distance into a conductor than low frequency waves. ...

Also question is, In which of the following material the attenuation constant and the phase constant are equal?. Explanation: The phase constant and the attenuation constant are both the same in

**the case of conductors**.

Correspondingly, Does electromagnetic waves travel faster in conductors than in dielectrics?

18. ( ) E and H can hardly propagate through good conductors. ... ( ) Electromagnetic waves travel

**faster**in conductors than in dielectrics.

Which parameter is unity in air medium *?

Which parameter is unity in air medium? Explanation: In free space or air medium,

**the relative permeability**is also unity, like relative permittivity. The absolute permeability is given by 4π x 10

^{-}

^{7}units.

**35 related questions found**

### What is the direction of Poynting vector?

The direction of the vector product S is **perpendicular to the plane determined by the vectors E and B**. For a traveling electromagnetic wave, the Poynting vector points in the direction of the propagation of the wave.

### What is the value of conductivity in free space?

**Materials like air and vacuum (space) have no conductivity**. Some materials, such as copper or steel (or metals in general) have very high conductivities, and the conductivity can often be approximated as infinite. This means the material has a resistance of zero.

### What is the speed of electromagnetic wave?

The speed of electromagnetic radiation of all kinds is the same universal constant that is defined to be exactly **c = 299,792,458 metres per second (186,282 miles per second)**.

### What is the speed of electromagnetic?

The electromagnetic spectrum

These waves all travel at **the speed of light (300,000,000 metres per second)** in a vacuum.

### How do electromagnetic waves travel?

Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves **can travel not only through air and solid materials, but also through the vacuum of space**. ... This proved that radio waves were a form of light!

### What is minimum attenuation?

Coax transmission lines exhibit a well-known minimum in attenuation versus line impedance. At zero ohms the loss/length is infinity, the same is true at infinity ohms. Air coax has its minimum attenuation at **77 ohms**. It is believed that this phenomenon is what caused the 75 ohm impedance standard for cables.

### Which two parameters are zero in the lossless line?

Which two parameters given below are zero in the lossless line? Explanation: Due to the minimal losses in the lossless transmission line, the **parameters of conductance and attenuation constant** are assumed to be zero.

### What is meant by lossy dielectric?

A lossy dielectric medium is defined as **a medium in which the electric conductivity is not equal to zero yet it is not a good conductor**.

### What is skin depth of conductor?

The skin depth is **a measure of the current density**, and is defined as the distances from the outer edges of a conductor to the point at which the current density falls to 1/e of the value at the surface.

### What do you mean by evanescent wave?

In electromagnetic theory, evanescent waves are **elecromagnetic waves that do not propagate and are spatially concentrated in the vicinity of the source**. Evanescent waves are produced in many situations. One of those is Total internal reflection of lgiht (TIR).

### What is meant by displacement current?

: **a limited shifting of electric components that occurs within a dielectric when a voltage is applied to or removed from it** (as in charging or discharging a capacitor) and that corresponds to the current in the circuit supplying the voltage.

### How does light travel in a vacuum?

There are no molecules of air or anything else in a vacuum. Like all forms of electromagnetic waves, **light can travel through empty space**, as well as through matter. Light can be absorbed. Absorbed light energy is converted into some other form, such as thermal or heat energy.

### Which electromagnetic wave is the fastest?

Photons travel in harmonic waves at the fastest speed possible in the universe: 186,282 miles per second (299,792,458 meters per second) in a vacuum, also known as the **speed of light**. The waves have certain characteristics, given as frequency, wavelength or energy.

### What is the fastest speed in the universe?

For centuries, physicists thought there was no limit to how fast an object could travel. But Einstein showed that the universe does, in fact, have a speed limit: the speed of light in a vacuum (that is, empty space). Nothing can travel faster than **300,000 kilometers per second (186,000 miles per second)**.

### What are the 7 types of electromagnetic waves and their uses?

**What are the 7 types of electromagnetic waves and their uses**

- Radio waves: Communication.
- Microwaves: Heating and data transmission.
- Infrared waves: Used in remote control and imaging applications.
- Visible light: Help us see everything around us.
- Ultraviolet Waves: Useful in the study of galaxies.

### What are 3 types of medium through which waves can travel?

Sound waves can travel through **solids, liquids, or gases**. The speed of sound depends on the medium. The type of matter that a wave travels through determines the speed of the wave.

### Which has the longest wavelength?

**Red** has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light. Ultraviolet (UV) light—is radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 nm to 400 .

### What is the symbol of conductivity?

Electrical conductivity is usually represented by the symbol **σ**. where R is the electrical resistance of a sample of material of length L and uniform cross-sectional area A.

### Does increasing voltage increase conductivity?

Conductivity is a constant for any material once it is isotropic in nature. In this case increasing the **voltage will simply increase the current**. However, at higher voltage conductivity can be dependent on the voltage due to extra effect such as ionization in the medium due to high voltage.

### What is the unit of Poynting vector?

Due to the fact that the Poynting vector represents the field's energy flux density, its physical unit is **watts per square metre (W m ^{−}^{2})**. Consequently, the Poynting vector provides information about the direction of propagation of the EM field and information about the direction of energy transport in the EM field.