A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 72 Ω, R3 = 105 Ω and R4 = 107 Ω. The capacitance is C = 81 μF and the battery voltage is V = 24 V.
1)The switch has been open for a long time when at time t = 0, the switch is closed. What is I1(0), the magnitude of the current through the resistor R1 just after the switch is closed?

Question

A circuit is constructed with four resistors, one capacitor, one battery and a switch as shown. The values for the resistors are: R1 = R2 = 72 Ω, R3 = 105 Ω and R4 = 107 Ω. The capacitance is C = 81 μF and the battery voltage is V = 24 V.
1)The switch has been open for a long time when at time t = 0, the switch is closed. What is I1(0), the magnitude of the current through the resistor R1 just after the switch is closed?

anonymous · Answer

If the resistors are in series, just add them up to get the equivalent resistance. The current will be the same across all of them.

anonymous · Answer

At t = 0, the capacitor hasn't had a chance to get charged up, so the current is just   I = V/R

jamesj · Answer

Whatever else, you will need to include a circuit diagram as it cannot be analyzed without understanding the configuration of components.

anonymous · Answer

Ah shoot I forgot