--- title: "Unit 11 – Electric Circuits - AP Physics C: E&M" description: "Review Unit 11 – Electric Circuits for AP Physics C: E&M with Fiveable study guides and practice resources." canonical: "https://fiveable.me/ap-physics-c-e-m/unit-11" type: "unit" subject: "AP Physics C: E&M" unit: "Unit 11 – Electric Circuits" --- # Unit 11 – Electric Circuits - AP Physics C: E&M ## Overview Unit 11 – Electric Circuits ## Study Guides - [11.1 Electric Current](/ap-physics-c-e-m/unit-11/1-electric-current/study-guide/9YRMrkv1PVy23BzH) - [11.2 Electric Circuits](/ap-physics-c-e-m/unit-11/2-electric-circuits/study-guide/17WyJIXaesWwOEX8) - [11.3 Resistance, Resistivity, and Ohm's Law](/ap-physics-c-e-m/unit-11/3-resistance-resistivity-and-ohms-law/study-guide/TnRPkql9C75GQe0d) - [11.4 Electric Power](/ap-physics-c-e-m/unit-11/4-electric-power/study-guide/u2cRqQTlthIAJtwp) - [11.5 Compound Direct Current Circuits](/ap-physics-c-e-m/unit-11/5-compound-direct-current-circuits/study-guide/lvbJLaPd4EqBAUf6) - [11.6 Kirchhoff's Loop Rule](/ap-physics-c-e-m/unit-11/6-kirchhoffs-loop-rule/study-guide/Nxj12AcsMRzP3ejn) - [11.7 Kirchhoff's Junction Rule](/ap-physics-c-e-m/unit-11/7-kirchhoffs-junction-rule/study-guide/2tEeZRNyXUYgq63j) - [11.8 Resistor-Capacitor (RC) Circuits](/ap-physics-c-e-m/unit-11/8-resistor-capacitor-rc-circuits/study-guide/qy6QreLu93jx043L) ## FAQs ### What topics are covered in AP Physics E&M Unit 11? AP Physics E&M Unit 11 covers 8 topics centered on resistance and electric circuits: Electric Current, Simple Circuits, Resistance/Resistivity and Ohm's Law, Electric Power, Compound Direct Current Circuits, Kirchhoff's Loop Rule, Kirchhoff's Junction Rule, and Resistor-Capacitor (RC) Circuits. The unit builds from basic current and resistance up to analyzing multi-loop circuits with Kirchhoff's Rules, then finishes with RC circuits where capacitors charge and discharge over time. See [AP Physics E&M Unit 11](/ap-physics-c-e-m/unit-11) for matched practice on each topic. ### How much of the AP Physics E&M exam is Unit 11? Unit 11 makes up 15-25% of the AP Physics E&M exam, making it one of the most heavily weighted units. That weight reflects how central resistance and electric circuits are to the course. Topics like Ohm's Law, Kirchhoff's Rules, and RC circuits all appear regularly on both the multiple-choice and free-response sections. ### What's on the AP Physics E&M Unit 11 progress check (MCQ and FRQ)? The AP Physics E&M Unit 11 progress check includes both MCQ and FRQ parts drawn from all 8 topics in the unit. The MCQ section tests resistance, Ohm's Law, electric power, and circuit analysis with Kirchhoff's Rules. The FRQ part typically asks you to analyze a compound DC circuit or an RC circuit, set up equations, and interpret results. College Board designs the progress check to mirror real exam difficulty, so it's one of the best checkpoints before test day. Head to [AP Physics E&M Unit 11](/ap-physics-c-e-m/unit-11) for practice questions matched to each progress check topic. ### How do I practice AP Physics E&M Unit 11 FRQs? The best way to practice AP Physics E&M Unit 11 FRQs is to focus on the topics that generate the most free-response questions: Compound DC Circuits, Kirchhoff's Loop and Junction Rules, and RC Circuits. FRQs in this unit typically ask you to derive an expression for resistance or current, apply Kirchhoff's Rules to a multi-loop circuit, or sketch and interpret a charge-vs-time graph for an RC circuit. For each practice problem, write out every step explicitly, because College Board awards points for correct setup even if your final answer is off. You can find FRQ-style problems organized by topic at [AP Physics E&M Unit 11](/ap-physics-c-e-m/unit-11). ### Where can I find AP Physics E&M Unit 11 practice questions? For AP Physics E&M Unit 11 practice questions, including multiple-choice and practice test sets, go to [AP Physics E&M Unit 11](/ap-physics-c-e-m/unit-11). That page organizes MCQ and FRQ practice by topic, covering resistance and Ohm's Law, Kirchhoff's Rules, electric power, and RC circuits. For the best results, mix MCQ drills with full practice test sections so you get comfortable with both the calculation-heavy multiple-choice questions and the longer free-response format this unit is known for. ### How should I study AP Physics E&M Unit 11? Start with resistance and Ohm's Law (Topic 11.3) before anything else, since that relationship underpins every other topic in the unit. From there, build up to series and parallel circuits (11.5), then tackle Kirchhoff's Loop Rule (11.6) and Junction Rule (11.7) together since they work as a system for solving multi-loop problems. Finish with RC circuits (11.8), which add a time-dependent layer on top of everything before. A few concrete steps that help: - Draw every circuit diagram yourself rather than just reading the textbook's version. - Practice setting up Kirchhoff's equations before solving them, since setup is where most points are lost on FRQs. - For RC circuits, make sure you can sketch charge and current vs. time graphs and explain what the time constant means physically. Check [AP Physics E&M Unit 11](/ap-physics-c-e-m/unit-11) for topic-by-topic practice to test your understanding as you go. ## Structured Data ```json {"@context":"https://schema.org","@type":"FAQPage","inLanguage":"en","mainEntity":[{"@type":"Question","@id":"https://fiveable.me/ap-physics-c-e-m/unit-11#what-topics-are-covered-in-ap-physics-e-and-m-unit-11","name":"What topics are covered in AP Physics E&M Unit 11?","acceptedAnswer":{"@type":"Answer","text":"AP Physics E&M Unit 11 covers 8 topics centered on resistance and electric circuits: Electric Current, Simple Circuits, Resistance/Resistivity and Ohm's Law, Electric Power, Compound Direct Current Circuits, Kirchhoff's Loop Rule, Kirchhoff's Junction Rule, and Resistor-Capacitor (RC) Circuits. The unit builds from basic current and resistance up to analyzing multi-loop circuits with Kirchhoff's Rules, then finishes with RC circuits where capacitors charge and discharge over time. See AP Physics E&M Unit 11 for matched practice on each topic."}},{"@type":"Question","@id":"https://fiveable.me/ap-physics-c-e-m/unit-11#how-much-of-the-ap-physics-e-and-m-exam-is-unit-11","name":"How much of the AP Physics E&M exam is Unit 11?","acceptedAnswer":{"@type":"Answer","text":"Unit 11 makes up 15-25% of the AP Physics E&M exam, making it one of the most heavily weighted units. That weight reflects how central resistance and electric circuits are to the course. Topics like Ohm's Law, Kirchhoff's Rules, and RC circuits all appear regularly on both the multiple-choice and free-response sections."}},{"@type":"Question","@id":"https://fiveable.me/ap-physics-c-e-m/unit-11#whats-on-the-ap-physics-e-and-m-unit-11-progress-check-mcq-and-frq","name":"What's on the AP Physics E&M Unit 11 progress check (MCQ and FRQ)?","acceptedAnswer":{"@type":"Answer","text":"The AP Physics E&M Unit 11 progress check includes both MCQ and FRQ parts drawn from all 8 topics in the unit. The MCQ section tests resistance, Ohm's Law, electric power, and circuit analysis with Kirchhoff's Rules. The FRQ part typically asks you to analyze a compound DC circuit or an RC circuit, set up equations, and interpret results. College Board designs the progress check to mirror real exam difficulty, so it's one of the best checkpoints before test day. Head to AP Physics E&M Unit 11"}},{"@type":"Question","@id":"https://fiveable.me/ap-physics-c-e-m/unit-11#how-do-i-practice-ap-physics-e-and-m-unit-11-frqs","name":"How do I practice AP Physics E&M Unit 11 FRQs?","acceptedAnswer":{"@type":"Answer","text":"The best way to practice AP Physics E&M Unit 11 FRQs is to focus on the topics that generate the most free-response questions: Compound DC Circuits, Kirchhoff's Loop and Junction Rules, and RC Circuits. FRQs in this unit typically ask you to derive an expression for resistance or current, apply Kirchhoff's Rules to a multi-loop circuit, or sketch and interpret a charge-vs-time graph for an RC circuit. For each practice problem, write out every step explicitly, because College Board awards points for correct setup even if your final answer is off. You can find FRQ-style problems organized by topic at AP Physics E&M Unit 11."}},{"@type":"Question","@id":"https://fiveable.me/ap-physics-c-e-m/unit-11#where-can-i-find-ap-physics-e-and-m-unit-11-practice-questions","name":"Where can I find AP Physics E&M Unit 11 practice questions?","acceptedAnswer":{"@type":"Answer","text":"For AP Physics E&M Unit 11 practice questions, including multiple-choice and practice test sets, go to AP Physics E&M Unit 11. That page organizes MCQ and FRQ practice by topic, covering resistance and Ohm's Law, Kirchhoff's Rules, electric power, and RC circuits. For the best results, mix MCQ drills with full practice test sections so you get comfortable with both the calculation-heavy multiple-choice questions and the longer free-response format this unit is known for."}},{"@type":"Question","@id":"https://fiveable.me/ap-physics-c-e-m/unit-11#how-should-i-study-ap-physics-e-and-m-unit-11","name":"How should I study AP Physics E&M Unit 11?","acceptedAnswer":{"@type":"Answer","text":"Start with resistance and Ohm's Law (Topic 11.3) before anything else, since that relationship underpins every other topic in the unit. From there, build up to series and parallel circuits (11.5), then tackle Kirchhoff's Loop Rule (11.6) and Junction Rule (11.7) together since they work as a system for solving multi-loop problems. Finish with RC circuits (11.8), which add a time-dependent layer on top of everything before. A few concrete steps that help:\n- Draw every circuit diagram yourself rather than just reading the textbook's version.\n- Practice setting up Kirchhoff's equations before solving them, since setup is where most points are lost on FRQs.\n- For RC circuits, make sure you can sketch charge and current vs. time graphs and explain what the time constant means physically. Check AP Physics E&M Unit 11 for topic-by-topic practice to test your understanding as you go."}}]} ```