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# chap24 - PHYS 1302 Introductory General Physics II Chapter...

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1 PHYS 1302 Introductory General Physics II Chapter 24: AC Circuits

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7/21/09 LAU/PHYS 1302 Chapter 24 12-2 AC Circuits (Summary) square6 AC Voltage is a sinusoidal (sine) function of time . square6 Resistors behave as in DC circuits. square6 Capacitors and inductors behave differently; current and voltage are in general out of phase . square6 Circuits with R, C and L are mathematically complicated because Kirchoff’s Laws apply to instantaneous currents and voltages : adding trigonometric functions. square6 Phasor diagram is a graphical method for adding and subtracting trigonometric functions visually. square6 Ohm’s Law applies to rms values in AC circuits with R replaced by impedance (Z) which depends on C, L, and ω . square6 RLC circuits are mathematically similar to a spring-mass system with friction .
7/21/09 LAU/PHYS 1302 Chapter 24 12-3 AC generators Φ B = AB cos θ = AB cos ω t ε = - ΔΦ B Δ t = AB ω sin ω t

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7/21/09 LAU/PHYS 1302 Chapter 24 12-4 AC voltages ε = NBA ω sin ω t = ε max sin ω t T = 1 f = 2 π ω
7/21/09 LAU/PHYS 1302 Chapter 24 12-5 An AC Generator Connected to a Lamp

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chap24 - PHYS 1302 Introductory General Physics II Chapter...

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