A portable spot welder uses a step-down transformer to deliver a high current at a safe, low voltage to fuse metal sheets.
Figure 1 shows a schematic diagram of this transformer system.
Calculate the current drawn from the mains a.c. supply to achieve the power output shown.
Assume that the transformer is 100% efficient.
Induced potential, transformers and the National Grid (physics only) (HT only) Questions
Practise AQA GCSE Physics Induced potential, transformers and the National Grid (physics only) (HT only) with exam-style questions for Foundation and Higher tier. 15 questions covering Induced potential (HT only), Uses of the generator effect (HT only), Microphones (HT only), and Transformers (HT only), matched to the AQA GCSE Physics (8463) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.