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AP Physics Chapter 19 DC Circuits

This section covers the principles of resistors in series and parallel circuits in DC circuits. In series circuits, the current remains constant, while the total resistance is the sum of individual resistances (Req = R1 + R2 + R3). The total voltage is the sum of the voltages across each resistor (V = V1 + V2 + V3). In parallel circuits, the voltage remains constant across all components, and the total current is the sum of the individual currents (I = I1 + I2 + I3). The equivalent resistance can be calculated using 1/Req = 1/R1 + 1/R2 + 1/R3. Homework assignments are provided for practice.

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AP Physics Chapter 19 DC Circuits

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  1. AP Physics Chapter 19DC Circuits See Circuit symbols chart page 555.

  2. 19-1 Resistors in Series and Parallel • Series Circuits • Current is constant in a series circuit. • Resistors in series are added… • Req=R1 + R2 + R3 • V=V1 + V2 + V3=IR1 + IR2 + IR3 • V=IReq

  3. Parallel Circuits • I=I1 + I2 + I3 • Voltage is constant in a parallel circuit. • 1/Req=1/R1 + 1/R2 + 1/R3…. • See diagrams page 555-558 • See Example 19-1 and 19-2 p558 • See Example 19-3 and 19-4 p560 and Example 19-6 p561

  4. HOMEWORK • P581 PR# 1-7 and 15 due Thurs. BOP

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