Lesson: Capacitor Charging and Discharging
In this lesson, we will learn how to describe exponential changes with time in capacitive circuits, knowing that such changes depend on a circuit's time constant.
Sample Question Videos
Worksheet: 21 Questions • 6 Videos
How much time is required to charge an initially uncharged 500 pF capacitor to of its maximum voltage if a resistance of 65.0 MΩ is included in the charging circuit?
A heart pacemaker generates electrical pulses 60 times a minute. A battery in series with a resistor charges the pacemaker’s 40 nF capacitor to 0.630 of the capacitor’s full voltage with each pulse. What is the resistance of the resistor?
What is the equivalent capacitance of the circuit?
What is the RC time constant?
How long would it be before the current decreases to 50% of the initial value once the switch is closed?