Final answer:
Ohm's law describes the relationship between current, voltage, and resistance in an electrical circuit. The agreement between Ohm's law and calculated resistances depends on the conditions of the experiment.
Step-by-step explanation:
Ohm's law is a fundamental relationship that describes the relationship between current, voltage, and resistance in an electrical circuit. It states that the voltage across a resistor is equal to the current through the resistor multiplied by the resistance of the resistor.
When calculating resistances, the agreement with Ohm's law depends on the conditions of the experiment. At low currents, resistors typically obey Ohm's law and show a linear relationship between voltage and current. However, at higher currents, resistors can deviate from Ohm's law due to heating effects.
These deviations can be observed in the form of a non-linear relationship between voltage and current.
In conclusion, Ohm's law provides a useful tool for understanding the behavior of resistors in electrical circuits, but its agreement with calculated resistances depends on the specific conditions of the experiment.