# An RC circuit consists of a 5 uF capacitor, an 80,000 ohm resistor, and a 12-V…

An RC circuit consists of a 5 uF capacitor, an 80,000 ohm

resistor, and a 12-V battery. The switch is closed at t=0.

a) Find the time constant of the circuit.

b) Find the time to reach 90% of the maximum charge across the

capacitor.