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Voltage & Energy. Voltage is the work done by 1 coulomb of Q as it moves between 2 points in a circuit. V=W/Q⇒W=VIt. 1V=1J÷1C. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome instagram.com/p/CdF3YiqjBhn/…

Electrical Power. P=W/t=IVt/t ⇒ P=IV. Sub. for I & V from V=IR. ⇒P=(V/R)V=V²/R. ⇒P=I(IR)=I²R. Components dissipate energy ➝ heat. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome instagram.com/p/CdGzcHDjab5/…

Ohm's Law. Voltage across conductor ∝ current flowing through if temperature is constant. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome @ London, United Kingdom instagram.com/p/CdIWyUCjcfr/…

Resistance & temperature. Increased temp. ⇒ increases resistance for a conductor (greater ion vibration). #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome @ London, United Kingdom instagram.com/p/CdJAWMZDNBa/…

Kirchhoff's Laws. 1. ΣI into junction = ΣI out (charge conserved). 2. ΣE around circuit LOOP = Σpd same loop (energy conserved). #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome instagram.com/p/CdJh_lQD-eg/…

Series & Parallel. Series: R=R₁+R₂ (R increases). Parallel: 1/R=1/R₁+1/R₂ (R decreases). Don't forget the reciprocal in calcs! #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome instagram.com/p/CdK6CgcDiR3/…

NTC Thermistors & LDRs. Resistances change specifically with temperature / light intensity. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome @ London, United Kingdom instagram.com/p/CdLrmFtjpgN/…

#physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome @ London, United Kingdom instagram.com/p/CdMNd_sDSYv/…

Potential Dividers. P.d. divided by resistors in series. Voltage out controls another circuit. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome @ London, United Kingdom instagram.com/p/CdOg6TqjpDa/…

Resistivity. R∝L & R∝1/A. Prop. const. is ρ ⇒ ρ=RA/L [Ωm]. Resistance for material L=1m & A=1m². Compare inherent R of materials. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome instagram.com/p/CdPGPoFDkJL/…

E.m.f. & internal resistance. P.d. drop across resistance in the power supply. V=E–Ir. If R↑⇒I↓⇒Ir↓⇒V↑. #phys140 #physics #alevelphysics #physicsalevel #alevelphysicshq #learnathome @ London, United Kingdom instagram.com/p/CdP7mbkDauX/…

Why Lunar Eclipses happen 15-16 May If you’re in London (or UK) total eclipse is visible ~04:30-05:00 Hoping for good weather 🤞 #lunareclipse #alevelphysicshq

Physics teachers. I am looking for some help! I have some of these lovely notes for Advancing Physics, but not the complete set. Does anyone have these? Thank you! 🙂

Every September I share this great quote with my students: “If you only do what you can do, you will never be more than you are now.” Learning anything is hard work; but without it you’ll never get to where you want. All the best for exams 2022! ▸Master Shifu (Kung Fu Panda)🤩

All the best for a level physics Paper 1 tomorrow. Especially if it’s your first external exam for ~ 5 years !!! #alevelphysics

Got Paper 1 tomorrow? How you feeling? Poll👇 Seeing a lot of concern over waves 🌊 ❓Ask me anything on waves if you want #alevelphysics

#alevelphysics students how was paper 1? #alevels2022

😱 ⅔ #physics papers done How was paper 2? #alevelphysics #physicsalevel

It is done - paper 3 ✅ I hope you finished well. How was it? ☑️☑️☑️ I hope you get to where you wanted to go now that A-Level Physics is over. #ocr #aqaphysics #unifiedphysics #ocrphysics #alevelphysics #aqaphysics #edexcelphysics #physicspaper3 #alevels2022