Does higher resistivity mean more heat?
The heating effect of an electric current depends on three factors: The resistance, R of the conductor. A higher resistance produces more heat.
The Resistivity of Various Materials
A material with high resistivity means it has got high resistance and will resist the flow of electrons. A material with low resistivity means it has low resistance and thus the electrons flow smoothly through the material. For example, Copper and Aluminium have low resistivity.
The Nichrome wire being an alloy have very high resistivity hence very high resistance. That is why it produces lot of heat on passing current and become red hot from this heat while passing electricity through the circuit .
As a result of which electrical energy is converted into heat energy. The heating element of an electric heater converts electrical energy into heat energy, therefore it should possess high specific resistance.
Resistivity is indirectly proportional to the temperature. As there is an increase in the temperature of materials, their resistivities will decrease. But this is not true for every material, i.e., all materials do not have the same dependence on temperature.
Sensitivity gives almost no advantage from one extreme to the other. It's almost entirely personal preference. I play with a pretty high sensitivity in most games, though I tend to thrash my sticks around in racing games so those get toned down quite a bit. Players play best with the settings they like.
High resistivity designates poor conductors. Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l. The unit of resistance is the ohm.
Resistance wire is used to control the amount of current in a circuit. High resistivity is better since a shorter wire can then be used. When the stability of the resistor is of primary importance the alloy's temperature coefficient of resistivity and corrosion resistance are very important in material selection.
Resistivity (ρ) is an intrinsic property of a material relating to the materials resistance to the flow of electrical current. A high resistivity indicates that a material is not a good conductor of electricity.
Current tends to create heat in high resistance wires. The electrons collide with stationary metal atoms and convert some of their kinetic energy into heat energy. The heating coil in a toaster or electric heater is made of high resistance wire. As current passes through the wire it quickly heats up and glows red hot.
Why does resistance increase temperature?
Electrons flowing through a conductor are impeded by atoms and molecules. The more these atoms and molecules bounce around, the harder it is for the electrons to get by. Thus, resistance generally increases with temperature.
These collisions use up some of the energy stored in the free electrons which in turn increases the resistance to current flow. Therefore increasing temperature of a conductor increases the resistance.
In metal conductors, when the temperature increases, the ion cores in the metal vibrate with a larger amplitude. This hinders the flow of electrons, and the resistivity increases.
The resistivity of a semiconductor decreases with temperature. This is because of increasing temperature, the electrons in the valence band gain sufficient thermal energies to jump to the conduction band. As the number of electrons in the conduction band increases, so conductivity increases and resistivity decreases.
As a rule of thumb, the lower the thermal conductivity the better, because the material conducts less heat energy. Thermal conductivity is a property of the material and does not take into account thickness. Two different thicknesses of the same material still have the same λ-value.
The resistivity of a semiconductor decreases with temperature. This is because of increasing temperature, the electrons in the valence band gain sufficient thermal energies to jump to the conduction band. As the number of electrons in the conduction band increases, so conductivity increases and resistivity decreases.
Heat has a direct relationship with resistance. Heat equals power time. As a result, H and R are inversely proportional.