An industrial electrolytic cell requires a continuous current of 3.5 kA3.5\text{ kA}3.5 kA to deposit copper from a copper sulfate solution.
Which of the following is a correct equivalent unit for the ampere (A\text{A}A), derived from the fundamental definitions of potential difference and electric current?
joule-volt per second (J V s−1)\text{joule-volt per second } (\text{J V s}^{-1})joule-volt per second (J V s−1)
joule per volt-second (J V−1s−1)\text{joule per volt-second } (\text{J V}^{-1}\text{s}^{-1})joule per volt-second (J V−1s−1)
volt-second per joule (V s J−1)\text{volt-second per joule } (\text{V s J}^{-1})volt-second per joule (V s J−1)
joule per volt (J V−1)\text{joule per volt } (\text{J V}^{-1})joule per volt (J V−1)
32 exam-style questions on Edexcel GCSE Physics 10.1 Circuits, charge and current, covering 10.1.1 Structure of the atom, 10.1.2 Circuit diagrams and symbols, 10.1.3 Series and parallel circuits, 10.1.4 Potential difference and voltmeters, 10.1.5 Energy transferred, charge and potential difference, and 10.1.6 Current, ammeters and charge flow. Each one has a worked solution and a mark scheme showing where the marks go.