When we say that an electric current flowing through the filament of a light bulb causes the bulb to produce light, we mean 'cause' in the sense of a:
A) Relative and an absolute condition.
B) Necessary and a sufficient condition.
C) Sufficient but not a necessary condition.
D) Relative but not an absolute condition.
E) Necessary but not a sufficient condition.

Question

Quizplus · Accepted Answer

When we say that an electric current flowing through the filament of a light bulb causes the bulb to produce light, we mean that the presence of the electric current is a necessary condition for the light to be produced, and it is also a sufficient condition for the light to be produced. Without the electric current, there would be no light, and with the electric current, the light will always be produced. Thus, the relationship between the electric current and the light produced can be described as a necessary and sufficient condition, which is the best fit for option B.

When We Say That an Electric Current Flowing Through the Filament