philipc said:Lets say I'm given a 'specific heat, density, currenty density J, and the time that J exist, how can if find the the change in Temperature? My main problem is I don't know how to start the problem, a couple pointer in the right direction would be great.
Thanks
Philip
Delta T, or ΔT, refers to the change in temperature of a resistor. It is important in calculations because it affects the resistance of the resistor, which in turn affects the flow of current and the voltage drop across the resistor. Accurate calculation of Delta T is crucial in ensuring the proper functioning and longevity of a resistor.
To calculate Delta T for a resistor, you need to know the initial temperature of the resistor, the final temperature of the resistor, and the thermal resistance of the resistor. The formula for calculating Delta T is ΔT = (Tf - Ti) / Rth, where Tf is the final temperature, Ti is the initial temperature, and Rth is the thermal resistance.
Delta T is typically measured in degrees Celsius (°C) or Kelvin (K). Thermal resistance is measured in degrees Celsius per watt (°C/W) or Kelvin per watt (K/W). It is important to make sure that the units of all values used in the Delta T calculation are consistent.
Delta T directly affects the power rating of a resistor. As Delta T increases, the resistance of the resistor also increases, which can cause the resistor to dissipate more heat. This can lead to a decrease in the power rating, as the resistor may not be able to handle the increased heat dissipation without getting damaged.
No, the Delta T calculation may vary for different types of resistors. This is because different types of resistors have different thermal resistances and may have different temperature coefficients. It is important to refer to the manufacturer's specifications for the specific resistor being used to ensure an accurate Delta T calculation.