What is the time constant for the circuit in Figure P19.67? Sketch how the current through the circuit and the voltage across the capacitor vary with time after the switch is closed.

 

In the circuits in Figures P19.67, P19.70, and P19.72, assume the resistance values are R₁ = 1500Ω and R₂ = 2400 Ω, and with capacitances C₁ = 45 μF and C₂ = 25 μF. The emf is ε = 5.5 V. The switches are labeled S.

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R1 Figure P19.67