A Physics Student Performed an Experiment in Which the Potential

question 79

Multiple Choice

A physics student performed an experiment in which the potential difference V between the ends of a long straight wire was varied.The current I in the wire was measured at each value of the potential difference with an ammeter and the results of the experiment are shown in the table. Which one of the following statements is the best conclusion based on the data?

• A)The resistance of the wire is 20 .
• B)The wire does not obey Ohm's law.
• C)The current in the wire is directly proportional to the applied potential difference.
• D)The wire obeys Ohm's law over the range of potential differences between 5 and 30 V.
• E)The wire obeys Ohm's law over the range of potential differences between 5 and 20 V.

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Definitions:

Constraints

Limitations or conditions that must be followed or satisfied within problem-solving or optimization processes.

Linear Optimization Models

Mathematical models that optimize (maximize or minimize) a linear objective function, subject to a set of linear constraints.

Basic Solver

An optimization algorithm tool used in mathematical programming and operations research to find an optimal solution by varying multiple inputs within given constraints.

Solving Method

A systematic approach or strategy used to find solutions to problems, often involving mathematical or logical operations.