The value of a real-world resistor ______ changes with significant time as the resistor conducts a current.
never
rarely
sometimes
usually
I think either never or rarely, but I'm not sure. When you unplug the resistor, the Ammeter and Voltmeter reading goes down to 0 because you disrupt the electrical current, but I don't know in regards to this question.
Thanks you for your help!
The correct answer to the question is "usually." The value of a real-world resistor usually changes with significant time as it conducts a current.
Resistors are electronic components that limit the flow of electric current in a circuit. They are characterized by their resistance, which is a measure of how much they impede the flow of current. However, over time, several factors can cause the resistance of a real-world resistor to change.
One significant factor is the temperature. When a resistor conducts a current, it dissipate power and heat is generated. This heat can cause the resistor's temperature to increase, leading to a change in its resistance. Most resistors have a temperature coefficient of resistance (TCR), which indicates how much the resistance changes with temperature.
Additionally, other factors like aging, material properties, and manufacturing variations can also contribute to changes in a resistor's resistance over time. These changes may be negligible in some cases, especially for precision resistors designed with low TCR and high stability. However, in more general applications, it is common to observe some variation in resistance over time.
Therefore, the value of a real-world resistor usually changes with significant time as it conducts a current. It is important to consider these factors when designing circuits or selecting resistors, especially in applications where precision and stability are crucial.