What value resistor will charge a 2.0 µF capacitor to 80% of its maximum charge in 4.0 ms?

Two parallel plate capacitors, C₁ and C₂, are connected in series with a 65.0-V battery and a 290-k resistor, as shown in the figure. Both capacitors have plates with an area of 2.31 cm² and a separation of 0.170 mm. Capacitor C₁ has air between its plates, and capacitor C₂ has the gap filled with porcelain (dielectric constant of 7 and dielectric strength of 5.70 kV/mm). The switch is closed, and a long time passes. a) What is the charge on capacitor C₁? Submit Answer Tries 0/100 b) What is the charge on capacitor C₂? Submit Answer Tries 0/100 c) What is the total energy stored in the two capacitors? Submit Answer Tries 0/100 d) What is the electric field inside capacitor C₂? Submit Answer Tries 0/100 R + Vemf C₁ I C₂

In the circuit below C1 = C3 = C4 = 2 μF; C2 = C5 = C6 = 4 μF and Vab = 100 V (i)What is the equivalent capacitance of the network  (ii)What is the charge stored in capacitor C6 ? What is the voltage across it?  (iii) If the capacitors C6 and C3 blow-out then what will be the charges in the remaining 4 capacitors.

A leaky capacitor loses 5% of its charge in 5 min. What is the effective time constant of the system? The time constant, τ =  Units             . What fraction of charge (in %) will be on the capacitor after 10 min? The charge, QQ0×100%QQ0×100% =  Units             . After what time there will be 4% of the initial charge left on the capacitor? The time, t =  Units             .