3.6 Electrical Systems notes (NCEA Level 3 Physics)

Energy in a capacitor example: missing a 1/2 on the 2nd line of working. PDF: https://drive.google.com/file/d/1-WJ-MvdLVe3xZbAeFwMmxYDKJjcZPshg/view Website: https://www.mrwhibley.com/ Support: https://www.buymeacoffee.com/mrwhibley Previous version: https://youtu.be/AJvJaqNKfog 0:00 Introduction 0:10 Direct current 2:39 Voltage 3:29 Ohm’s law 4:57 DEMONSTRATION: Thermal expansion 5:24 Equivalent resistance 7:20 DEMONSTRATION: Lamp circuits 8:36 Internal resistance 11:49 Kirchoff’s current law 12:29 DEMONSTRATION: Kirchoff’s current law 12:56 Kirchoff’s voltage law 16:10 DEMONSTRATION: Kirchoff’s voltage law 17:13 Capacitors 19:09 DEMONSTRATION: Ultra capacitor 19:38 Dielectrics in capacitors 23:41 DEMONSTRATION: Capacitor dissection 24:25 Charging and discharging capacitors 29:59 Energy in a capacitor 31:52 Capacitors in circuits 32:25 DEMONSTRATION: Capacitors in circuits 33:26 Magnetic flux 34:23 Faraday’s law 37:32 DEMONSTRATION: The Coherer effect 38:43 Lenz’s law 40:48 DEMONSTRATION: St Louis motor 41:30 DEMONSTRATION: Inductive braking 42:31 Self inductance 43:30 Inductors 44:55 Inductor factors 45:43 Inductor energy 46:12 DEMONSTRATION: Solenoid resonance 46:50 Inductor time constant 49:04 Transformers 52:00 Transformer efficiency 52:33 DEMONSTRATION: Transformer efficiency 53:42 DEMONSTRATION: Jacob’s ladder 54:23 AC circuits 56:32 RMS 57:34 LCR circuits 1:00:42 Phase in an LCR 1:04:03 Reactance 1:06:08 Impedance 1:07:11 DEMONSTRATION: Contactless payments 1:08:11 LCR resonance 1:11:50 DEMONSTRATION: LCR resonance