Question

3.4.2 quiz: testing scientific solutions
why did you test the resistance of the wire?
a. the current flowing through the lightbulb was too high. increasing resistance would decrease current.
b. the current flowing through the lightbulb was too high. decreasing resistance would decrease current.
c. the current flowing through the lightbulb was too low. increasing resistance would increase current.
d. the current flowing through the lightbulb was too low. decreasing resistance would increase current.

Explanation:

According to Ohm's Law \(I = \frac{V}{R}\) (where \(I\) is current, \(V\) is voltage, and \(R\) is resistance). If the current \(I\) is too high (assuming voltage \(V\) is constant), to decrease \(I\), we need to increase \(R\) (since \(I\) and \(R\) are inversely proportional when \(V\) is fixed).

Answer:

A. The current flowing through the lightbulb was too high. Increasing resistance would decrease current.