This section is about applying some more advanced rules to circuits that build on your GCSE skills. The trick is to realise that you must be 100% logical and treat it as a mathematical exercise. If you set up the problems correctly then you cannot go wrong. Take note of these things that you must be able to do…
Make sure you treat current and pd as having a direction.
Learn how to apply reciprocal equations for 1/R for resistors in parallel
Learn what the gradient and intercept mean on an Internal Resistance circuit graph
Remember that a power source is a “real source” and will get warm so lose energy! A 3V cell does not output 3V!
When thinking about potential dividers the trick is to realise that current is the same through each resistor. So setup two equations for V for each then I is the same for both!
http://scienceshorts.net Please don't forget to leave a like if you found this helpful! Join the Discord for support! https://discord.gg/pyvnUDq --------------------------------------- 00:00 Kirchhoff's 1st & 2nd laws 02:11 2nd law worked example ...- ---------------------------------------------------------------------- I don't charge anyone to watch my videos, so please donate if you can to keep me going! https://bit.ly/scienceshortsdonate[+] Show More
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Kirchhoff's Laws - A-level Physics
http://scienceshorts.net Please don't forget to leave a like if you found ...
http://scienceshorts.net Please don't forget to leave a like if you found this helpful! Join the Discord for support! https://discord.gg/pyvnUDq --------------------------------------- 00:00 Kirchhoff's 1st & 2nd laws 02:11 2nd law worked example ...- ---------------------------------------------------------------------- I don't charge anyone to watch my videos, so please donate if you can to keep me going! https://bit.ly/scienceshortsdonate[+] Show More
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Kirchhoff's First Law - A Level Physics
This video introduces and explains Kirchhoff's First Law for A Level ...
This video introduces and explains Kirchhoff's First Law for A Level Physics.
Kirchhoff's 1st Law (sometimes called Kirchhoff's Current Law, Kirchhoff's Junction Law or Kirchhoff's Junction Rule) states that at any ...point in an electrical circuit, the sum of currents into that point is equal to the sum of currents out i.e. electrical charge is conserved.
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards: AQA CIE Edexcel Edexcel IAL Eduqas IB OCR A OCR B WJEC
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This video introduces and explains electrical power for A Level Physics. ...
This video introduces and explains electrical power for A Level Physics.
The rate at which energy is transferred in electrical components is the electrical power. Here I show you how to ...derive the electrical power equation: P=IV and the other equations that you need to know.
Thanks for watching,
Lewis
This video is recommended for anyone studying A Level Physics in the following exam boards: AQA CIE Edexcel Edexcel IAL Eduqas IB OCR A OCR B WJEC
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MY PHYSICS WEBSITES Find even more videos organised by exam board and topic at:
MY YOUTUBE CHANNEL Your support in watching this video has been invaluable! To contribute towards the free videos on YouTube, make a small donation at: ► https://www.paypal.me/physicsonline
Measuring Internal Resistance - PRACTICAL - A Level Physics
In this video I go through an AQA Physics A Level Required Practical that ...
In this video I go through an AQA Physics A Level Required Practical that uses an electrical circuit experiment to measure the internal resistance of a cell or battery. (This ...is AQA Required Practical 6.) This is also the OCR A Level Physics PAG 3.3 Practical.
Internal resistance is the electrical resistance within the cell or battery that is powering the circuit. Measuring internal resistance can be done by changing the external resistance of the circuit and recording the terminal p.d of the cell. When a graph is plotted the gradient is the negative value of 'r' while the y-intercept should be equal to the e.m.f. of the cell.
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Batteries & Cells in Series & Parallel: reasons & advantages
Sometimes we may see batteries or cells wired in series and at other times ...
Sometimes we may see batteries or cells wired in series and at other times they may be wired in parallel. This video show why batteries or cells are wired in ...parallel and then at other times they are in series. The video shows what can be gained from these two scenarios and some of the points to watch out for and whether cells should be connected in series or parallel for particular applications.
The video also shows the typical voltages of some of the cells, and it also details the basics of charge capacity - increasing either or both of these may be the reason for connecting the cells in series or parallel to form a battery.
The video also details some of the points to watch when connecting cells in series or parallel to form a battery. It shows some of the pitfalls and shows the results of this.
We analyze a circuit using Kirchhoff's Rules (a.k.a. Kirchhoff's Laws). The Junction Rule: "The sum of the currents into a junction is equal to the sum ...of the currents out of that junction." (Conservation of Charge) The Loop Rule: "The sum of the voltages around a closed loop is equal to zero." (Conservation of Energy)[+] Show More
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Kirchhoff's Rules (Laws) Worked Example | Doc Physics
The Loop and Junction Rules are in full effect. Some people call 'em laws, ...
The Loop and Junction Rules are in full effect. Some people call 'em laws, but not me!
So, you can avoid the equivalent circuit reduction method if you prefer TONS ...OF TEDIOUS MATH. Of course, sometimes, this is the only option. I pity da fool.[+] Show More
Electricity: Potential Dividers in a Snap! Unlock the full A-level Physics ...
Electricity: Potential Dividers in a Snap!
Unlock the full A-level Physics course at http://bit.ly/34i5kVk created by Elisavet, Physics expert at SnapRevise.
SnapRevise is the UK’s leading A-level and GCSE revision & ...exam preparation resource offering comprehensive video courses created by A* tutors. Our courses are designed around the OCR, AQA, SNAB, Edexcel B, WJEC, CIE and IAL exam boards, concisely covering all the important concepts required by each specification. In addition to all the content videos, our courses include hundreds of exam question videos, where we show you how to tackle questions and walk you through step by step how to score full marks.
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