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The time of oscillation of pendulums with different lengths is measured. Which is the dependent variable?

Answer and explanation

Correct answer: The time of oscillation

The direct answer is B: the time of oscillation. In an experiment, the independent variable is the factor deliberately changed by the investigator, while the dependent variable is the result measured in response. Here, the lengths of the pendulums are different, so length is the changed factor. The time taken for oscillation is measured, so it is dependent on the chosen length. Option A, mass, is not the measured outcome and is not identified as the changing factor. Option B is correct because it is the recorded response. Option C, length, is the independent variable, not the dependent variable. Option D, thread colour, has no stated role and is irrelevant unless specifically tested. A useful rule is: ask, “What did I change?” for independent and “What did I measure?” for dependent.

Related tags

ScienceDependent-VariablePendulumOscillationVariables In An ExperimentExploration: Entering The World Of Secondary ScienceExploration Entering The World Of Secondary ScienceClass 9 Mcq

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