Dielectric & Magnetic Nanoparticles with EM field

[saddevilblues]

Hi all,

Homework Statement

1. What are the impacts of EM field on Aluminium Ferrite nanoparticles (carry both dielectric & magnetic features), compare to EM field applied on Aluminium oxide (pure dielectric)?

2. If solenoid is used to generate magnetic field; what is it use to generate EM waves?

3. Does the same 'function generator' could be used for both EM & magnetic field, to record their impacts on a material?

4. Does an antenna necessary to embed near the material to generate the amplified waves?

5. How to calculate the distance between the EM/Magnetic field generator to the material to produce a low frequency waves, say 10^2 - 10^7 Hz?

6. What is a way to measure the frequency reflected back from the material?

Homework Equations

I have no information regarding this.

The Attempt at a Solution

Its not a problem, but general questions to clear the concept


Your responses would be greatly appreciated.
Thank you.

 

[mark726]

Dear forum members,

1. The impacts of EM field on Aluminium Ferrite nanoparticles can be significant due to their combined dielectric and magnetic features. When exposed to EM waves, the nanoparticles can experience both electric and magnetic forces, which can affect their properties and behavior. In comparison, pure Aluminium oxide, being a dielectric material, would only experience electric forces under the influence of EM waves.

2. A solenoid is used to generate a magnetic field by passing electric current through its coils. This magnetic field can then interact with a varying electric field to produce EM waves. This process is known as electromagnetic induction.

3. Yes, a function generator can be used to generate both EM and magnetic fields. However, the settings and parameters would need to be adjusted accordingly to produce the desired field.

4. It is not necessary to embed an antenna near the material to generate amplified EM waves. However, an antenna can be used to enhance the strength and direction of the waves.

5. The distance between the EM/Magnetic field generator and the material can be calculated using the formula for the wavelength of EM waves: λ = c/f, where λ is the wavelength, c is the speed of light, and f is the frequency. For example, for a frequency of 10^2 Hz, the wavelength would be approximately 3,000 km. Therefore, to produce a low frequency of 10^2 - 10^7 Hz, the distance between the generator and the material would need to be in the range of a few kilometers to a few meters.

6. The frequency reflected back from the material can be measured using a spectrum analyzer or an oscilloscope. These instruments can detect and display the frequency of the reflected waves. Alternatively, the reflected waves can also be measured using a network analyzer, which can provide more detailed information about the material's response to the EM waves.

I hope this helps to clarify your concepts. Please let me know if you have any further questions.