AP Physics C Electricity and Magnetism Flashcards: Electric Charge And Electric Force

Study Electric Charge And Electric Force in AP Physics C Electricity and Magnetism with focused flashcards that help you recognize the idea, recall the key rule, and apply it in practice-style prompts.

QUESTION

What is the direction of electric field lines around a negative charge?

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ANSWER

Radially inward. Negative charges attract field lines toward them.

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AP Physics C Electricity and Magnetism: Electric Charges, Fields, and Gauss's Law

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What this deck covers

This deck focuses on Electric Charge And Electric Force, giving you a quick way to review the definitions, rules, and examples that matter most for AP Physics C Electricity and Magnetism.

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Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Practice questions

1 of 8Practice questions for this set

Electric charge is a conserved property of matter measured in coulombs (C); it comes in positive and negative types, and the total charge of an isolated system remains constant. Electric forces act at a distance: like charges repel, unlike charges attract, and the force magnitude depends on charge and separation. In space, two point charges

q_1=+4.0\times10^{-6}\ \text{C}

and

q_2=+1.0\times10^{-6}\ \text{C}

are fixed

0.30\ \text{m}

apart. Coulomb's Law gives the magnitude:

F=k\frac{|q_1q_2|}{r^2}

. A numerical check:

F=(8.99\times10^{9})\frac{(4.0\times10^{-6})(1.0\times10^{-6})}{(0.30)^2}

. If a third charge is later introduced, the principle of superposition states the net force on any charge equals the vector sum of forces from each other charge calculated separately. How does the force between charges change if the distance is doubled?

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