O Level Physics 5054 Unit 4 Electricity and magnetism part 1

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This video is provided the physics revision that follows syllabus as Cambridge O Level Physics 5054 for exam 2023 to 2028
▪️The syllabus for the period 2023 to 2025 is identical to the syllabus for 2026 to 2028

Timestamp for Unit 4 Electricity and magnetism
4.2 Electrical Qualities
00:00 4.2.1 Electric charge
0:27▪️Two types of charges and where charge comes from?
2:00▪️Electric field
3:24▪️Conductor and insulator, and how an insulator can be charged by friction
3:38▪️How a conductor can be charged by induction
5:45▪️Electrostatic phenomena: How charged ruler can be attracted a piece of paper
6:17▪️How a charged comb can be attracted your hair and a charged balloon can be attracted the stream of water
6:48▪️How a charged ballon can be sticking to the wall and the lightning can be happening during the thunderstorm
7:33 4.2.2 Electric current
8:04▪️Definition of the electric current and how a current can be flowing through a conductor
10:21▪️Measuring a current using an ammeter
11:27▪️Direct current and alternating current
12:19 4.2.3 Electromotive force and potential difference
12:47▪️Definition of the electromotive force and potential difference
14:32▪️Measuring an EMF and p.d. using a voltmeter
15:31▪️Connecting cells in series and parallel
16:20 4.2.4 Resistance
16:45▪️Definition of resistance
17:50▪️Fixed resistor and variable resistor
19:15▪️Experiment to determine the resistance of a resistor using an ammeter and voltmeter
20:29▪️Factors that affect to the resistance of a metallic conductor
22:09▪️Exam style 1
23:07▪️Exam style 2
24:17▪️Ohm’s law and the current-voltage graph for a resistor
25:24▪️Current-voltage graph for a filament lamp
26:22▪️Current-voltage graph for a diode
4.3 Electric Circuit
27:22 4.3.1 Circuit diagram and circuit components
34:51 4.3..2 Series and parallel circuit
35:18▪️Basic series circuit
37:12▪️series circuit summaries
38:55▪️How determine the total resistance, total current, and p.d across each component in series
43:37▪️Basic parallel circuit
45:22▪️parallel circuit summaries
47:17▪️How determine the total resistance, total current, and p.d across each component in parallel
51:36▪️Compound circuit and short circuit
54:26 4.3.3 Action and uses of circuit components
54:53▪️Basic potential divider circuit
57:28▪️LDR and thermistor in potent divider
4.4 Practical Electricity
59:17 4.4.1 Use of Electricity
59:46▪️Heating effects
1:00:55▪️Electrical power and electrical energy
1:02:56▪️Kilowatt-hour and measuring energy usage
1:05:10 4.4.2 Electrical safety
1:05:35▪️Electrical hazards from main electricity
1:06:58▪️Main electricity and Main circuit
1:08:52▪️Plugs and sockets
1:10:10▪️Fuse, switch and circuit breaker
1:11:37▪️Earth wire
1:12:32▪️Fuse values
1:14:04 4.6 Uses of an oscilloscope
1:14:29▪️Waveforms of an AC
1:16:16▪️Measuring p.d. and frequency with an oscilloscope
1:17:51▪️Exam style

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