How does resistance change with temperature for Ohmic conductors and filaments?

In summary, resistance for an Ohmic conductor is directly proportional to temperature, represented by a straight line passing through the origin. For a filament, resistance is initially directly proportional to temperature but then decreases with a decreasing gradient, as seen with Tungsten in light bulbs. This relationship between resistance and temperature is specific to metals and is known as Ohm's law.
  • #1
GingerPrince
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Homework Statement



How does does resistance vary with temperature for an Ohmic conductor and filament?

Homework Equations





The Attempt at a Solution


So what I know is that resistance(Ohms) against temperature(K) for an Ohmic conductor is directly proportional with the graph passing through the Origin and being a straight line.
And for a filament, the resistance is directly proprtional for a range of temperatures and then decreases with the graph having a decreasing gradient.
Note this is Grade 11 level. I HAVE AN EXAM :(
 
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  • #2

Related to How does resistance change with temperature for Ohmic conductors and filaments?

1. What is the relationship between resistance and temperature?

The relationship between resistance and temperature is a direct one. As temperature increases, the resistance of a material also increases. This means that when the temperature of a material goes up, its ability to resist the flow of electric current also increases.

2. Why does resistance increase with temperature?

Resistance increases with temperature due to the increase in energy and movement of atoms within a material. As the temperature increases, the atoms vibrate more, making it harder for the flow of electric current to pass through the material.

3. What is the effect of temperature on conductors and insulators?

Temperature has different effects on conductors and insulators. In conductors, the increase in temperature leads to an increase in resistance. On the other hand, in insulators, the increase in temperature leads to a decrease in resistance.

4. How does temperature affect the accuracy of electronic devices?

Temperature can have a significant impact on the accuracy of electronic devices, especially those that rely on precise resistance values. As the temperature changes, the resistance of the components within the device can also change, leading to inaccuracies in measurements or operations.

5. What is the temperature coefficient of resistance?

The temperature coefficient of resistance (TCR) is a measure of how much the resistance of a material changes with a change in temperature. It is usually expressed as a percentage per degree Celsius or per degree Fahrenheit. TCR is an essential factor in determining the behavior of materials in relation to temperature changes.

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