A team of scientists is studying how the conductivity of a specific metal alloy varies with changes in temperature. Due to budget constraints, they have sourced the alloy from a local recycling facility that specializes in refining metals. The experiments are being conducted in a controlled environment where all other factors – such as room pressure, room volume, and electrical conditions – remain unchanged. Only the temperature will be adjusted.

Which of the following assumptions is essential for the validity of the study?

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Correct answer marked below

The purity of the metal alloy obtained from the facility is uniform.

Correct

The resistance in the electrical circuit remains unchanged.

The voltage applied to the alloy is kept constant.

The pressure in the experimental room is stable.

The volume of the experimental room does not change.

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Official Explanation

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In this experiment, the scientists are focusing on how temperature affects the conductivity of the metal alloy. For their results to be valid, it is crucial that the purity of the metal alloy is consistent throughout the study. If the purity varies, it could affect the conductivity independently of…

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Comments

BebasApr 29, 2025

can you explain more?

NaimishFeb 25, 2025

thanks for taking time to upload it!

LavanyaMar 20, 2025

Thank you very much!

ShwetaAug 22, 2024

thanks for the answer

What this question tests

What it tests

Whether you can identify the unstated assumption a critical-reasoning argument depends on.

Common trap

Picking an option that strengthens the argument or is merely relevant instead of one that is required.