What is the dependent variable, After learning about electricity, a student wants to see if electricity flows better through different materials. Our wonderful student has different materials: copper wire, aluminum wire, carbon fiber, and gold wire. The student attaches a small lightbulb to a 9 volt battery, and uses each wire to see how bright the lightbulb lights up when connected to each material.

The Lightbulb is the dependent variable.

Explanation:

The dependent variable is defined as the variable that the researcher is measuring or testing and it observes the direct effect/change brought by manipulation in the independent variable. In the given experiment, the lightbulb would be characterized as the dependent variable as it is being tested by the researcher. He controls the independent variable(by using different wires) to observe its direct impact on the way the lightbulb lits. Thus, it(lightbulb) is the dependent variable.

answer(a) occurs after your prediction;

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