Part A The capacitor in an RC circuit (R-140 50 uF ) is initially uncharged 2.C

Question

Part A The capacitor in an RC circuit (R-140 50 uF ) is initially uncharged 2.C Find the charge on the capacitor in the circuit one time constant (T- RC) after the circuit is connected to a 9.0-V battery. Express your answer using two significant figures AC Submit Request Answer Part B Find the current in the circuit one time constant ( = RC) after the circuit is connected to a 9.0-V battery. Express your answer using two significant figures I(T) mA Submit Request Answer Return to Assignment Provide Feedback

Explanation / Answer

part A)

for the charge

q = c * v *(1 - e^(-t/T))

at t = 1 T

q = 50 * 9 * (1 - e^-1)

q = 284 uC

the charge on the capacitor is 284 uC

part B)

current in the circuit = V/R * e^(-t/T)

current in the circuit = 9/140 * e^(-1)

current in the circuit = 0.0236 A = 23.6 mA

the current in the circuit is 23.6 mA after 1 time constant

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