Mango12 said:Starting a car: the voltage drops from 12V to 7.2 V, it is 0 degrees out, and 150 amps are pulled from the car. What is the temperature coefficient of the resistor?
I have NO idea how to do this. Help please!
I like Serena said:Hi Mango! ;)
We'll need more information.
From the information you provided, we can only tell that:
$$R_o = \frac{7.2 \text{ V}}{150\text{ A}} \\
R_i = \frac{4.8 \text{ V}}{150\text{ A}}
$$
where $R_i$ is the internal resistance of the battery, and $R_o$ is the outer resistor.
We would need for instance a reference resistance at room temperature of the battery to say anything about temperature coefficient.
Is any such given? (Wondering)
The temperature coefficient is a measure of the change in a material's physical or electrical properties with respect to temperature.
The temperature coefficient is calculated by taking the ratio of the change in a material's property to the change in temperature.
There are two main types of temperature coefficients: positive and negative. A positive temperature coefficient means that the material's property increases as temperature increases, while a negative temperature coefficient means that the property decreases with increasing temperature.
Temperature coefficient is important in scientific research because it helps scientists understand how a material will behave at different temperatures. This is crucial for designing and optimizing experiments and processes.
Temperature coefficient is used in a variety of practical applications, such as in electronic devices to ensure their proper functioning at different temperatures. It is also used in material science to design materials with specific properties for different temperature ranges.