How Buzzer Circuit Works
we simply learned that when we connect the two longer wires it closes the circuit hence turning on the buzzer in the same manner when we disconnect the to longer wires it opens the circuit hence turning off the buzzer.
Segmented LED Explained
In a segmented LED, there is one shared positive (the middle prong), but each segment has its own negative (remaining 4 prongs).
About the NPN Circuit Pt 1
So when the two long wires are not connected the power is not allowed to the base on F12 hence not allowing power to the buzzer.
About the PNP Circuit
That the pnp transistor works opposite of the NPN
How does the circuit work?
When both of the wires are still in the in the circuit there's a Current and when you take out one of the wires the circuit breaks
Why your electro-magnet gets warm
because of electric curret