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Electric Circuits

Electric Circuits is around 20%–30% of your AP test. This unit focuses on current, resistance, voltage, and power in electrical circuits. Understanding Ohm's law, Kirchhoff's rules, and circuit analysis helps solve problems involving resistors, capacitors, and complex circuit networks.

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Electric Circuits Diagram
Electric Circuits is the study of electrical current flow, resistance, voltage, and power in conductive pathways. In AP Physics C: Electricity & Magnetism, this unit introduces current, Ohm's law, Kirchhoff's rules, and circuit analysis techniques. It focuses on how electrical components like resistors and capacitors behave in series and parallel configurations, and how to analyze complex circuits using systematic methods. Mastery of electric circuits helps understand power distribution, energy transfer, and the behavior of electrical systems.
Circuit Diagram

Relevant Formulas On Equation Sheet:

Electric Circuits Formulas Electric Circuits Formulas Electric Circuits Formulas

Concept 1: Current, Drift Velocity, and Current Density

Key Topic 1: Electric Current and Drift Velocity

Key Topic 2: Current Density and Microscopic Ohm's Law

Concept 2: Resistance and Resistivity

Key Topic 1: Resistance and Resistivity

Key Topic 2: Ohm's Law

Concept 3: EMF and Internal Resistance

Key Topic 1: Electromotive Force and Batteries

Key Topic 2: Internal Resistance and Terminal Voltage

Concept 4: Meters in Circuits

Key Topic 1: Ammeters and Voltmeters

Key Topic 2: Proper Meter Connections

Key Topic 3: Other Symbols in Circuits

Concept 5: Power in Circuits

Key Topic 1: Electrical Power and Energy

Key Topic 2: Power Dissipation in Resistors

Concept 6: Circuit Breakdown and Expansion

Key Topic 1: Circuit Breakdown

Key Topic 2: Circuit Expansion

Concept 7: Single-Loop Circuits

Key Topic 1: Kirchhoff's Voltage Law (KVL)

Key Topic 2: Single-Loop Circuit Analysis

Concept 8: Multi-Loop Circuits

Key Topic 1: Kirchhoff's Laws (KVL and KCL)

Key Topic 2: Multi-Loop Circuit Analysis

Concept 9: Capacitors in Circuits

Key Topic 1: RC Circuits and Transient Behavior

Key Topic 2: Energy Conservation in Circuits

Practice Tests

Practice Test 1: Electric Circuits

Practice Test 2: Electric Circuits

⚡ Electric Circuits: Check for Understanding