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false increasing temperature increases vibrations of cations in a metal lattice. This increases the chances of an electron colliding with a cation, decreasing overall mobility. Aside: when some metals and ceramics reach below a certain temperature their resistance drops to zero(literally) and they become superconducting, able to carry currents for thousands of years with no energy loss.
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How is an electron's wavelength related to its speed and mass?
The wavelength of an electron is inversely proportional to its speed and directly proportional to its mass. This means that as the speed of an electron increases, its wavelength decreases, and as the mass of an electron increases, its wavelength also increases.
What is thermionic thermometer?
A thermionic thermometer uses the thermionic emission of electrons from a heated filament to measure temperature. When the temperature increases, the emission of electrons also increases, allowing for a correlation between temperature and electron emission. These thermometers are used in high-temperature applications and can provide fast response times.
Why does resistance decrease as the NTC Resitor becomes warmer?
In NTC (Negative Temperature Coefficient) resistors, as the temperature increases, the number of charge carriers also increases. This results in more electron movement, decreasing the resistance. The relationship between temperature and resistance in NTC resistors is inversely proportional.
What is the relationship between the kinetic energy of an ionized electron and its movement in an electric field?
The kinetic energy of an ionized electron is directly related to its movement in an electric field. As the electron moves in the field, its kinetic energy increases, and the speed of the electron also increases. This relationship is governed by the principles of electromagnetism.
Can you explain why an electron's energy increases when it absorbs a photon and also describe what happens to the photon in this process?
When an electron absorbs a photon, its energy increases because the photon transfers its energy to the electron. The photon ceases to exist as a discrete particle and its energy is absorbed by the electron, causing it to move to a higher energy level.
When the temperature of the room increased then the energy of semiconductor?
When the temperature of the room increases, the energy of a semiconductor also increases because more electrons are excited to higher energy levels. This can increase the conductivity of the semiconductor due to increased electron mobility. However, at very high temperatures, the semiconductor may experience thermal runaway and exhibit decreased performance due to excessive generation of electron-hole pairs.
How is an electron's wavelength related to its speed and mass?
The wavelength of an electron is inversely proportional to its speed and directly proportional to its mass. This means that as the speed of an electron increases, its wavelength decreases, and as the mass of an electron increases, its wavelength also increases.
What happens to the electron configuration as the atomic number increases?
the elctron configuration increases
What is thermionic thermometer?
A thermionic thermometer uses the thermionic emission of electrons from a heated filament to measure temperature. When the temperature increases, the emission of electrons also increases, allowing for a correlation between temperature and electron emission. These thermometers are used in high-temperature applications and can provide fast response times.
How does the electron's energy change as the orbit of the electron increases?
As the orbit of the electron increases, the electron's energy also increases. Electrons in higher energy orbits are farther from the nucleus and have more potential energy. Conversely, electrons in lower energy orbits are closer to the nucleus and have less energy.
What happens to ionic radius if you add an electron?
Adding an electron to an atom increases its negative charge, leading to an increase in electron-electron repulsions. This results in the outer electron shell expanding, causing the ionic radius to increase.
Why does resistance decrease as the NTC Resitor becomes warmer?
In NTC (Negative Temperature Coefficient) resistors, as the temperature increases, the number of charge carriers also increases. This results in more electron movement, decreasing the resistance. The relationship between temperature and resistance in NTC resistors is inversely proportional.
How is the specific charge of an electron affected when its speed increases?
Its charge is always 1.6X10-19 However when it's speed increases, it has more energy
What do you think happens to the size of the electron when it loses and electron?
The ATOM decreases in size when it loses an electron and increases when electrons are added.
How does electron affinity vary in periods?
Increases from left to right in a period
Why basic character of alkali metals increases down the group?
The basic character of alkali metals increases down the group because as you move down the group, the atomic size increases and the outermost electron is further away from the nucleus. This results in a weaker hold on the outermost electron, making it easier for the metal to lose it and exhibit basic properties.
Why does the resistance of a conductor rise with temperature?
The mechanism of metallic resistance : as temperature increases the thermal vibrations in the lattice increase causing more electron scattering therefore more collisions will take place, slowing down the electron flow. This increases the rate of transfer of electrical energy by heating and increases the electrical resistance. The semiconductor's electrons also vibrate more at higher temperature so this contributes to resistance increase in the same way as for a metal. So what else could make the semiconductor conduct better? The answer is: more charge carriers. Whereas the number of free electrons in a metal is constant the effect of heating a semiconductor frees additional electrons (and holes). For silicon in this temperature range the effect of additional charge carriers outweighs the effect of additional vibrations, so the overall resistance will decrease with temperature.
