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Why does the free electron theory fail to predict the semiconducting properties of materials?
Drawbacks of Classical free electron theory:1. It is macroscopic theory2. This theory cannot explain the electron conductivity ofsemiconductors and insulators.3. Ferromagnetism cannot be explained by this theory.4. This theory cannot explain the Photoelectric effect, Comptoneffect and the Black Body radiation.5. The calculated value of specific heat of metals is not matchingwith the experimental value.6. At low temperature, Lorentz number is not a constant. But by12classical theory it is a constant.7. Dual nature cannot be explained.8. Atomic fine spectra cannot be explained.9. Classical theory states that all the free electrons will absorbenergy, but quantum theory states that only few electrons willabsorb energy
What is the difference between a system and a subsystem?
explain the difference between systems and sub systems
How would you explain voltage to secondary students?
Voltage is the pressure that pushes electricity through wires (or other conductors) in the same way that water pressure pushes water through pipes.
Difference between single-point cutting tool use in lathe and shaping machine?
explain the difference between single point & multi point cutting tool
Explain the difference between electronics and electricity?
Electronics is a science dealing with electrons emission electrical is a science dealing with electron flow
Use the electron theory to explain how insulators and conductors work?
the same way an insulator and a conductor will work with out the electron theory!
What Explain why conductors and insulator produce?
Conductors conduct electricity because they have free electrons that can move easily, allowing electric current to flow through them. Insulators, on the other hand, do not have free electrons and prevent electric current from passing through them. This difference in electron mobility determines whether a material acts as a conductor or an insulator.
Can you explain briefly what are conductors and insulaters?
Conductors are materials that allow the flow of electricity through them easily because of the presence of free-moving electrons, such as metals. Insulators, on the other hand, are materials that do not easily allow the flow of electricity, preventing the movement of electrons, such as rubber or plastic. Conductors are used to transmit electricity, while insulators are used to protect against electric shock or to insulate against heat.
Do conductors have holes explain?
Yes, conductors have holes in their lattice structure due to the absence of an electron. This hole can move through the lattice and act like a positively charged particle, attracting electrons. It plays a crucial role in the conduction of electricity in materials like semiconductors.
Compare explain how the movements of electrons in electrical conductors and electrical insulaters affect the properties of the materials?
In electrical conductors, electrons can move freely, allowing for the transfer of electrical energy. This results in conductors having high electrical conductivity. In contrast, in insulators, electrons are tightly bound to their atoms and cannot move easily, leading to low electrical conductivity. Insulators have high resistance to the flow of electricity due to this lack of electron mobility.
What is the factors on which resistance depend .and explain?
Resistance depends on the material of the object (e.g. conductors, insulators), its dimensions (length, cross-sectional area), and temperature. These factors influence the flow of electrons through the material, impacting how difficult it is for current to pass through. Conductors have low resistance due to high electron mobility, while insulators have high resistance due to low electron mobility.
Why does the free electron theory fail to predict the semiconducting properties of materials?
Drawbacks of Classical free electron theory:1. It is macroscopic theory2. This theory cannot explain the electron conductivity ofsemiconductors and insulators.3. Ferromagnetism cannot be explained by this theory.4. This theory cannot explain the Photoelectric effect, Comptoneffect and the Black Body radiation.5. The calculated value of specific heat of metals is not matchingwith the experimental value.6. At low temperature, Lorentz number is not a constant. But by12classical theory it is a constant.7. Dual nature cannot be explained.8. Atomic fine spectra cannot be explained.9. Classical theory states that all the free electrons will absorbenergy, but quantum theory states that only few electrons willabsorb energy
How would you explain insulators?
The insulators are on the left side of the periodic table, past the mettalloids. Their atoms just do not interact with electricity or heat.
In your own words explain the difference between a conductor and an insulator?
A conductor is a material that allows the flow of electric current through it easily, due to the presence of free electrons. An insulator, on the other hand, does not allow the flow of electric current as easily, as it has very few free electrons. Insulators have high resistance to the flow of electricity, while conductors have low resistance.
What is the different between an insulator and a conductor using the bohr Rutherford model of atoms to explain?
In the Bohr-Rutherford model, conductors have outer electrons that are loosely bound and can easily move around, allowing electric current to flow through them. Insulators have outer electrons that are tightly bound and do not move easily, restricting the flow of electric current. Conductors typically have one to three electrons in their outer shell, while insulators have five to eight electrons in their outer shell.
How does the number of valence electrons in atoms of metalloids explain why metalloids are semiconductors?
Metalloids when used is electronics are called semiconductors.
What are the key principles and characteristics of the Bardeen model for semiconductors?
The key principles and characteristics of the Bardeen model for semiconductors include the concept of energy bands, electron-hole pairs, and the behavior of charge carriers in a semiconductor material. The model helps explain how semiconductors conduct electricity and how they can be used in electronic devices.
