Uploaded December 2025 | Updated September 2026, 3 weeks ago
My Physics Tutoring: zphysicslessons.net/physics-tutoring
Extra Help Videos: youtube.com/channel/UC3L5MO3gJTlB09wmmHGW5Qg/join
In this video we look at a deceptively simple physics problem on internal resistance, electricity and circuits. The problem uses only A Level Physics knowledge but builds onto some very interesting mathematics.
The problem is from the British Physics Olympiad 2020 Round 2:
bpho.org.uk/Papers/R2/2020Jan_R2.pdf. Question 1 b.
Please note that is not an official solution and I may be wrong. Please let me know if you agree with it.
It is great practice for interview questions for Physics and Engineering for Cambridge and Oxford, Imperial and similar top tier universities.
It can be used as extension to AQA A Level Physics, OCR A and B, Edexcel, Eduqas, WJEC and similar courses such as AP Physics.
My Physics Tutoring: zphysicslessons.net/physics-tutoring
Extra Help Videos: youtube.com/channel/UC3L5MO3gJTlB09wmmHGW5Qg/join
In this video we look at a deceptively simple physics problem on internal resistance, electricity and circuits. The problem uses only A Level Physics knowledge but builds onto some very interesting mathematics.
The problem is from the British Physics Olympiad 2020 Round 2:
bpho.org.uk/Papers/R2/2020Jan_R2.pdf. Question 1 b.
Please note that is not an official solution and I may be wrong. Please let me know if you agree with it.
It is great practice for interview questions for Physics and Engineering for Cambridge and Oxford, Imperial and similar top tier universities.
It can be used as extension to AQA A Level Physics, OCR A and B, Edexcel, Eduqas, WJEC and similar courses such as AP Physics.
