2.3. Capacitor Filter

Try these first

1. 1.

   What is the main function of a capacitor filter?

   Hint

   Think about how a ride on a bumpy road feels.

2. 2.

   Define ripple in the context of capacitor filters.

   Hint

   Consider what a wave looks like!

3. 3.

   What does a capacitor filter do?

   • Increase ripple
   • Smooth out DC output
   • Short circuit

   Hint

   Think about what happens to voltage when it’s not steady.

4. 4.

   True or False: Ripple is an undesirable component of DC output.

   • True
   • False

   Hint

   Consider how stable voltage helps electronics work better.

5. 5.

   Design a simple capacitor filter circuit that reduces ripple for an AC source. Provide values for the capacitor based on a given load.

   Hint

   Use the formula for ripple voltage to find the appropriate capacitance value.

6. 6.

   If a capacitor charged to 12V is suddenly connected to a load drawing 50mA, how long will it take for the voltage to drop to 6V, given that the capacitor has a capacitance of 1000µF?

   Hint

   Calculate R first, then use the equation for discharging exponential.