An ideal transformer has 960 turns on its primary coil and 80 turns on its secondary coil. The primary potential difference is 240 V. The secondary supplies a current of 3.0 A.
What are the secondary potential difference and the primary current?
20 V20\ \mathrm{V}20 V and 36 A36\ \mathrm{A}36 A
2880 V2880\ \mathrm{V}2880 V and 0.25 A0.25\ \mathrm{A}0.25 A
2880 V2880\ \mathrm{V}2880 V and 36 A36\ \mathrm{A}36 A
20 V20\ \mathrm{V}20 V and 0.25 A0.25\ \mathrm{A}0.25 A
108 exam-style questions on Edexcel GCSE Physics 13.2 Transformers and the National Grid, covering 13.2.1 Transformers and induction, 13.2.2 The transformer turns-ratio equation, 13.2.3 The National Grid, 13.2.4 The transformer power equation, and 13.2.5 Advantages of high-voltage transmission. Each one has a worked solution and a mark scheme showing where the marks go.