Final answer:
The relevant test to solve the problem of too high a current in lightbulbs is to increase resistance, which would decrease the current according to Ohm's law. This understanding helps ensure bulbs operate safely and efficiently.
Step-by-step explanation:
If the current in the company's lightbulbs was too high, running tests to address this issue is quite relevant. To decrease the current, one would need to increase the resistance, according to Ohm's law, which states that current (I) is equal to voltage (V) divided by resistance (R), or I = V/R. Therefore, the correct answer to why the tests were relevant to the problem is: Finding a way to increase resistance would lead to a decrease in current.
Understanding the relationship between voltage, current, and resistance is crucial to solving issues related to the power dissipated in electrical circuits. Since power (P) is also related to these quantities by the formula P = I2R or P = V2/R, adjusting these variables can help control the power. Additionally, this explanation is supported by the fact that if you were to increase the voltage across a bulb, the power and thus the current would increase, potentially leading to bulb failure. Conversely, increasing resistance with a constant voltage would decrease the current, thereby solving the problem of too high current.