PRACTICE

AP Physics C: Electricity and Magnetism

Attempt a question, check your answer, then follow the working.

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96 matching questions · Page 1 of 10

MCQ · Hard · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.1 · Model selection

A student proposes a model for Coulomb interactions, fields, flux, and Gauss's law. Which statement provides the strongest physics or statistical justification?

AThe conclusion follows because the variables have the same numerical value.BThe model is valid whenever a calculator produces a result.CThe model is valid because uncertainty can be ignored.DGauss's law relates net flux through a closed surface to enclosed charge, while external charge can still affect the local field

MCQ · Hard · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.10 · Principle evaluation

A classmate states: ‘Gauss's law relates net flux through a closed surface to enclosed charge, while external charge can still affect the local field.’ Which response best evaluates the statement?

AIt is false because scientific and statistical laws never use models.BIt can be tested only by memorizing a definition.CIt is useful only if the quantities, system or population, and conditions are identified.DIt is universally valid without conditions.

MCQ · Medium · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.11 · Residual analysis

Which observation would provide the clearest evidence that a chosen model for Coulomb interactions, fields, flux, and Gauss's law is inadequate?

ATwo values happen to be equal.BResiduals or deviations show a consistent pattern larger than expected uncertainty.CThe data contain units.DThe title of the graph is brief.

MCQ · Medium · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.12 · Scientific conclusion

What is the best final sentence in a response about Coulomb interactions, fields, flux, and Gauss's law?

ATherefore the answer is obvious.BThe calculation is finished, so assumptions do not matter.CTherefore, under the stated conditions, the evidence supports the result; the principal limitation is the identified uncertainty or model assumption.DTherefore the result applies to every possible system.

MCQ · Medium · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.2 · Assumptions

Which response best describes what must be established before using a vector field or symmetry-based flux model?

AThat the graph passes through the origin regardless of theory.BThat every observation has zero uncertainty.COnly that all measured values are positive.DA vector field or symmetry-based flux model.

MCQ · Medium · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.3 · Quality control

A result from a study of Coulomb interactions, fields, flux, and Gauss's law conflicts with the governing model. What is the best first action?

AAverage the result with zero.BDelete the result without recording it.CChange the model until it agrees with every point.DCheck the measurement, assumptions, and uncertainty before deciding whether the result is anomalous.

MCQ · Hard · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.4 · Claim and evidence

Which explanation most clearly connects evidence to a claim about Coulomb interactions, fields, flux, and Gauss's law?

AThe claim is correct because it is familiar.BThe measured trend agrees with the predicted relationship within uncertainty, so the evidence supports the claim over the tested range.CThe largest recorded value proves the claim for every possible case.DThe claim is correct because the axes use standard units.

MCQ · Medium · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.5 · Representations

When translating a result about Coulomb interactions, fields, flux, and Gauss's law to another representation, which approach is most reliable?

AKeep the shape but remove all units and directions.BReplace the data by a single unlabeled sketch.CUse the same symbol for every quantity.DTranslate among charge distributions, field vectors, and gaussian surfaces.

MCQ · Medium · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.6 · Domain

Which feature would most weaken a conclusion about Coulomb interactions, fields, flux, and Gauss's law?

AA conclusion that extends far beyond the measured domain without justification.BAn independently calibrated instrument.CRepeated trials that agree within uncertainty.DA model derived from the relevant conservation or inference conditions.

MCQ · Hard · 1 pointCalculator: allowed

Unit 8 · Coulomb interactions, fields, flux, and Gauss's law · 8.7 · Method comparison

Two methods are used to analyze Coulomb interactions, fields, flux, and Gauss's law. Method 1 states assumptions; Method 2 reports more decimal places but no assumptions. Which judgment is best?

ANeither method can ever be evaluated.BMethod 2 must be better because it has more digits.CMethod 1 is more defensible because validity depends on assumptions as well as arithmetic precision.DBoth methods are automatically equivalent.