4. This question is about charging a capacitor in a circuit with two resistors in series. A student constructs the circuit as shown: 6.0V 2.0ks 4.7 ks2 2200 UF a. Show that the time constant of the circuit is about 15 s. 163 x FC = 1. 5 X 20 -30 ) 2 X F p.d. /V 6- 5- 4- 3- 2 - 1 - time 5 RC C . Calculate the time it takes from the start of the charging for the p.d across the capacitor to reach 5.0 V. Further Questions 1. A 47 HF capacitor is charged to 6.0 V and then discharged through a 1.0 MQ resistor. a) What is the initial charge stored in the capacitor