Physics1C_Chapter31_part2

# Physics1C_Chapter31_part2 - CHAPTER 31 ALTERNATING CURRENTS...

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CHAPTER 31 ALTERNATING CURRENTS PART 2 Vah é  Peroomian

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EXAMPLE 4 A series RLC circuit has R = 425 Ω, L = 1.25 H, and C = 3.50 μF. It is connected to an AC source with f = 60.0 Hz and ΔV max = 150 V. (a) Determine the inductive reactance, the capacitive reactance, and the impedance of the circuit. (b) Find the maximum current in the circuit. (c) Find the phase angle between the current and voltage. (d) Find the maximum voltage across each element. (e) What replacement value of L should an engineer analyzing the circuit choose such that the current leads the applied voltage by 30.0° rather than 34.0°? All other values in the circuit stay the same. (f) What if you added up the maximum voltages across the three circuit elements? Is that a physically meaningful quantity?
POWER IN AC CIRCUITS Average power delivered in an LRC circuit P av = ς ρμσ Ι ρμσ χοσ φ = Ι ρμσ 2 Ρ

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EXAMPLE 5 Calculate the average power delivered to the series RLC circuit described in Example 5.
RESONANCE IN AC CIRCUITS LRC circuit said to be in “resonance” when

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