AQA A LEVEL PHYSICS PAPER 2 2023 | 7408/2 2023 | 2023 (COMPLETE WALKTHROUGH) Part – 3

ATTENTION TO QUESTION 2.6: PLEASE CONSIDER THE POWER 23.8 W AS THE POWER USED IN THE CIRCUIT. OUT OF 32.7W SUPPLIED, THE BULBS USED 23.8W AND THE REMIANING IS DISSIPATED AS HEAT. THEREFORE, WE NEED TO DIVIDE THE TOTAL POWER OF TWO BULBS WHICH 17.042 BY 23.8 W.

Hello. This is my second video of AQA A-level Physics Paper 2 (7408/2) 2023.
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[geoffphillips]

Hi sir, I've just realised. my mistake. I confused flux with change of flux ... now it all makes sense! Thanks for your great videos 😀

[geoffphillips]

meaning ..in A, line should be below the x axis in the first section & above it in the second ..since emf induced is minus change in flux . what am I missing here? thanks sir

[geoffphillips]

Q 22 (1.05 12) bit confused here. Shouldn't emf be negative in A? Given emf = minus change in flux? Lenz' law . thanks

[geoffphillips]

but I'm still not sure .... is there difference between delta phi -time graph & induced emf -time graph? thanks

[geoffphillips]

sorry still confused. I don't understand why Lenz negative sign is not there when you wrote the equation. Anyone as perplexed as me ?