"Many were given NO marks" in an A Level Physics Question

Join my 40 hour revision course: https://zphysicslessons.net/physics-t... To support this channel:    / @zhelyo_physics   In this video we look at a question on electricity and electrical circuits in A Level Physics on the variation of resistance. This is a question from the OCR A Level Physics Specification but also applicable to all exam boards including AQA A Level Physics, Edexcel, iEdexcel, CIE and similar courses such as AP Physics and IB Physics. Please note that this is not an official solution and I am not affiliated with the exam board. The original paper can be found here: https://www.ocr.org.uk/Images/677416-... And the mark scheme: https://www.ocr.org.uk/Images/677433-...