Level 4 · Lesson 4.1

Advanced electronics

Jimmy Bob, a friendly cartoon mountain man in a trucker cap and overalls

“Now we open the hood and look at the engine.”

You'll be able to

explain reactance, resonance, impedance, and decibels.

and oppose alternating current in a way that changes with frequency, which is called . A circuit is resonant when inductive and capacitive reactance cancel, at f = 1 / (2π√(LC)). combines resistance and reactance and is measured in ohms. Decibels compare power levels: +3 dB doubles power and +10 dB multiplies it by 10.

Tap an underlined word for its meaning.

Try it

On-air activity

a resonance calculator and a decibel conversion drill.

This one happens on the air in The Shack, which opens in a later phase.

Quick check

Get 2 of 3 right to complete the lesson.

1. +3 dB does what to power?
2. Resonance happens when…
3. Impedance combines…

Words from this lesson

Decibel