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When temperature increases resistance increases and conduction decreases why is this is so?
Generally when temperature increases, resistance increases and conduction decreases in metals. In semiconductors, this is generally inverted.
First, when temperature increases, the molecular activity of the material increases, making the energy (and activity) of the atoms to be higher. This can make it more difficult for the electrons to participate in the cascade effect that we call electric current, hence increased resistance.
Second, conductance is defined as the inverse of resistance; if resistance goes up, then conductance goes down, and vice versa.
What else can I help you with?
Why does the resistance of a semiconducting material decrease when the temperature increases?
The no of electrons in the conduction band increases when the temperature of the semiconductor material increases. therefore resistance decreases. This is also know as "Negative temperature coefficient"
Why do the semiconductors have negative temperature coefficient whereas the metals have positive values?
Semiconductors: When temperature increases, more electrons jump to conduction band from valance bond. Hence resistance decreases. Metals: Already plenty of electrons are there in conduction band. When temperature increases, the electrons in conduction band of metal vibrate and collide each other during their journey. Hence the the resistance of metal increases with increase of temperature. S.Lakshminarayana
When the temperature increases thermistor resistance decreases?
Yes, that's correct. In a thermistor, which is a type of temperature-sensitive resistor, the resistance decreases as the temperature increases. This is because the conductivity of the thermistor material increases with temperature, causing the resistance to decrease.
What is the relationship between the resistance of a thermistor and temperature?
The resistance of a thermistor decreases as the temperature increases.
How does the ac resistance of a diode change as the voltage increases?
When the voltage increases the temperature in the diode also increases. When the temperature in the diode increases, the resistance decreases.
How do you increase viscosity?
Viscosity is the resistance of a liquid to flow. When temperature decreases Viscosity generally increases. Viscosity generally decreases when the temperature increases.
What is the relationship between resistance and temperature?
• ntc 'negative temperature coefficient': its resistance decreases as the temperature increases• ptc 'positive temperature coefficient': its resistance increases as the temperature increases
If a carbon resistor increases in temperature its resistance will?
This depends on the type of conductor. If the conductor has a positive coefficient the resistance will increase. If the conductor has a negative temperature coefficient the resistance will decrease.
If the resistance of a substance decreases as its temperature increases it is said to have what type of temperature co-efficient?
copper
How does temperature affect the resistance of conducting materials?
As temperature increases, the resistance of conducting materials also typically increases. This is because as temperature rises, the atoms in the material vibrate more, leading to more collisions with electrons, which in turn increases resistance. Conversely, as temperature decreases, resistance tends to decrease as well.
What is a negativ temperature co-efficient?
A negative temperature coefficient (NTC) refers to a type of thermistor where the resistance decreases as the temperature increases. This means that as the temperature rises, the electrical resistance of the NTC thermistor decreases, allowing more current to flow through it. NTC thermistors are commonly used in temperature sensing and compensation applications.
How does temperature affect current flow in electrical circuits?
Temperature can affect current flow in electrical circuits by changing the resistance of the materials in the circuit. As temperature increases, the resistance of the materials also increases, which can reduce the flow of current in the circuit. Conversely, as temperature decreases, the resistance decreases, allowing for more current to flow through the circuit.
