This is the basic introduction to current flow and circuits. Really this unit is just an extension of GCSE Electricity with some harder problems using the same rules. Also you will need to remember how each component works and be able to interpret a VI graph. Always remember to check your gradient. Since V=IR a graph of V – y-axis and I – x-axis shows R as gradient. The other way around which is how we tend to do exp shows 1/R it does matter.
Electricity Calculations & Sig Figures….. I would advise all of you to look at this tutorial this week before you do the unit homework… https://www.chem.sc.edu/faculty/morgan/resources/sigfigs/index.html . An example is V = 12V, Resistance = 62Ω. If you work out the current through the resistor as V = IR changes to V/R = I = 12V/62 Ω = 0.193548A. The original data is 2 sig figures so you should quote the answer to this as well. Hence…
0.2A – Wrong 0.19A – Correct 0.193548A – Wrong
12.3 Resistance
resistivity (animation) Use this to think about how atoms actually look inside a metal. Then imagine a drift of electrons through this.
This quick demo shows the idea of sparking and how fast the spark can move between the electrodes and also how to the frequency of spark changes due to lower ...air resistance as you get closer to to he dome.[+] Show More
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Van De Graaf Electrical Current
This quick demo shows the idea of sparking and how fast the spark can move ...
This quick demo shows the idea of sparking and how fast the spark can move between the electrodes and also how to the frequency of spark changes due to lower ...air resistance as you get closer to to he dome.[+] Show More
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Resistance and Potential Difference models - GCSE Physics
Simple model to show PD, current and resistance with molymod.
Simple model to show PD, current and resistance with molymod.
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Resistance heating with SMEG cooking element
Disclaimer: please never try this at home 40A from a cooker will kill you ...
Disclaimer: please never try this at home 40A from a cooker will kill you on first touch!
This is a video to show you how a cooker element transformed energy via ...electrical mechanisms to Infra Red radiation which cooks your food. This element is usually covered by a plate which I took out to change the element and do a deep oven clean.[+] Show More
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Episode 9 Kinetic Energy
Amazing Eureka Physics video series from 1 to 30 which through cartoon go ...
Amazing Eureka Physics video series from 1 to 30 which through cartoon go through the amazing world of KS3 to A-Level Physics teaching with key concepts.
First released in Canada but ...still going strong![+] Show More
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AC v DC Diode Behaviour
Super cool demo of how diodes work in AC and DC currents. A diode will ...
Super cool demo of how diodes work in AC and DC currents.
A diode will flash at half the frequency of a filament lamp in AC situations.
You need a signal gen ...to see it or a high speed camera[+] Show More
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Alternating Current v Direct Current GCSE
This is a simple video to show electrical current with an AC and then DC ...
This is a simple video to show electrical current with an AC and then DC source. You can see how the alternating current is a wave which has a frequency ...of 50Hz and direct current is just steady.[+] Show More
Electricity: Potential Difference in a Snap! Unlock the full A-level ...
Electricity: Potential Difference in a Snap!
Unlock the full A-level Physics course at http://bit.ly/32WEhgT 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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Daniell cell - Volt Defined
The Daniell cell is a type of electrochemical cell invented in 1836 by John ...
The Daniell cell is a type of electrochemical cell invented in 1836 by John Frederic Daniell, a British chemist and meteorologist, and consisted of a copper pot filled with a ...copper sulfate solution, in which was immersed an unglazed earthenware container filled with sulfuric acid and a zinc electrode. He was searching for a way to eliminate the hydrogen bubble problem found in the voltaic pile, and his solution was to use a second electrolyte to consume the hydrogen produced by the first. Zinc sulfate may be substituted for the sulfuric acid. The Daniell cell was a great improvement over the existing technology used in the early days of battery development. A later variant of the Daniell cell called the gravity cell or crowfoot cell was invented in the 1860s by a Frenchman named Callaud and became a popular choice for electrical telegraphy. The Daniell cell is also the historical basis for the contemporary definition of the volt, which is the unit of electromotive force in the International System of Units. The definitions of electrical units that were proposed at the 1881 International Conference of Electricians were designed so that the electromotive force of the Daniell cell would be about 1.0 volts. With contemporary definitions, the standard potential of the Daniell cell at 25 °C is actually 1.10 V[+] Show More
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Potential Divider Circuits - A Level Physics
This video introduces and explains potential divider circuits for A Level ...
This video introduces and explains potential divider circuits for A Level Physics.
These are not too bad - just follow the basic rules for circuits and you can solve any problem. ...A potential divider circuit divides the potential and are often used with thermistors or LDRs as a sensing circuit.
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 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
#circuits #alevelphysics #physicsonline[+] Show More
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AC, rms & Diodes - GCSE & 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 AC 01:10 Half wave rectification 02:00 Full wave rectification - bridge ...circuit 02:23 Diode structure 03:15 rms: voltage, current & power - ---------------------------------------------------------------------- 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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Electric Charge - A Level Physics
This video introduces and explains electric charge for A Level Physics. You ...
This video introduces and explains electric charge for A Level Physics.
You can try this simple electric charge experiment at home, with an energy saving light bulb and a balloon. I ...also explain a bit more about the property of electric charge, its relationship with electricity and why it has the symbol 'Q'.
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
_____________________________________
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
#electricity #alevelphysics #physicsonline[+] Show More
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The Volt and W=VQ - A Level Physics
This video introduces the volt (the unit of potential difference) and how ...
This video introduces the volt (the unit of potential difference) and how to derive W=VQ for A Level Physics.
How can you define the volt? '1 volt is the potential difference between ...two points when 1 joule of work is done to move a charge of 1 coulomb.' or '1V is the p.d across a component when 1 joule of energy is transferred per coulomb of charge passing through the component.'
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
_____________________________________
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
Superconductivity in a Snap! Unlock the full A-level Physics course at ...
Superconductivity in a Snap!
Unlock the full A-level Physics course at http://bit.ly/2XwaL0f 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.
Sign up today and together, let’s make A-level Physics a walk in the park![+] Show More
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Resistivity - A Level Physics
If I have two copper wires with the same diameter, but one is longer than ...
If I have two copper wires with the same diameter, but one is longer than the other, you can expect the longer wire to have a higher resistance.
That’s because ...an electron needs to make its way between more positive ions before it reaches the other end. This means resistance is proportional to the length of wire.
Two wires that have the same length but have different cross-sectional area will have different resistance. The larger the cross sectional area a wire has, the lower the resistance it has. Resistance is inversely proportional to area.
We also need a way to take into account the material's ability to impede the motion of electrons. This is called resistivity.
Resistivity of the Material of a Wire - A Level Physics Core Practical
One of the core practicals in A Level Physics. This uses an Ohmmeter to ...
One of the core practicals in A Level Physics. This uses an Ohmmeter to measure the resistance of a wire directly. By varying the length of the wire, and taking ...sets of data across several thicknesses we can get to a value for the resistivity of the material in question.
At Gorilla Physics we’re all about you understanding more, so you get more confident, then enjoy Physics more and then you’ll do better in your GCSE and A Level Physics exams.
In this video I go over the basics of the potential divider or rheostat.
In this video I go over the basics of the potential divider or rheostat.
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I-V characteristics - A level physics
This video covers the I-V characteristics of a metallic conductor at ...
This video covers the I-V characteristics of a metallic conductor at constant temperature, a semiconductor diode, a filament lamp and a thermistor… However the I-V characteristics of the thermistor is ...not required if you study A level Physics, only if taking the Physical Science AS level.[+] Show More
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Diode Basics theory
how diodes work, find out how diodes work at their most basic level
how diodes work, find out how diodes work at their most basic level
Permanent link to this article: https://www.animatedscience.co.uk/4-electric-current-as-unit-1
