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Alternating Current and RLC Circuits

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Alternating Current and RLC Circuits

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    1. 1 Alternating Current and RLC Circuits Alternating Current: the current direction changes with time. Compare with DC in which the current direction stays the same with respect to time, the magnitude of the current may change. A typical case in AC: I = IMAXSIN(?t). A power source normally is described as V = VMAXSIN(?t). Generation: rotating wire loops in magnetic field generate AC power. (demo: 32.18) Main advantages: for power generation (actually the magnet turns) and transmission. Review: DC on RC and RL circuit, and now pay attention to the current/voltage relationship in time. RC

    2. 2 Alternating Current and RLC Circuits Review: DC on RC and RL circuit, and now pay attention to the current/voltage relationship in time. RL

    3. 3 Alternating Current and RLC Circuits R, C and L in AC circuits: R

    4. 4 Example An electric stove is specified as 6000W at 240V. If it is connected to an AC outlet in a laboratory. The AC outlet has a sticker reads V = 311SIN(100pt). What is heat the stove generates in 10 seconds?

    5. 5 Alternating Current and RLC Circuits R, C and L in AC circuits: C

    6. 6 example The generator in an AC capacitor circuit creates a maximum potential difference across the 3.37×10-6 F capacitor of 243 V. What is the amplitude of the alternating current if the frequency of the generator is (a) 455 Hz? (b) 1750 Hz?

    7. 7 Alternating Current and RLC Circuits R, C and L in AC circuits: L

    8. 8 example The generator in an AC inductor circuit creates a maximum potential difference across the 2.74×10-3 H inductor of 243 V. What is the amplitude of the alternating current if the frequency of the generator is (a) 455 Hz? (b) 1750 Hz?

    9. 9 Alternating Current and RLC Circuits Review of LC and beyond: LC oscillator Energy in LC oscillator

    10. 10 Alternating Current and RLC Circuits Review of LC and beyond: LC in AS circuits.

    11. 11 Alternating Current and RLC Circuits Add R to LC: RLC in AC circuits

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