Understanding Frequency in AC Circuits

Frequency plays an important role in how AC (alternating current) circuits work.

1. What is Frequency?
   Frequency is measured in hertz (Hz). It tells us how many times an AC wave repeats in one second.

2. How Frequency Affects Components:

   • Resistors: Frequency does not change how resistors work. They still follow a rule called Ohm's law.
   • Capacitors: When the frequency is higher, capacitors let more current pass through. We can calculate this with a formula, but all you need to know is that higher frequency helps them work better.
   • Inductors: Higher frequencies make inductors resist the current more. This means less current can flow through them.

3. Where We Use Different Frequencies:
   Different uses need different frequencies. For example, the electricity in our homes usually runs at 50 Hz. But for radio communication, we use much higher frequencies.

In short, knowing about frequency is important. It helps engineers create and improve AC circuits for what they need!