A student assembles the apparatus shown below to study the electrolysis of dilute sulfuric acid using inert platinum electrodes.

State one modification that can be made to this electrical circuit to indicate that an electrical current is flowing during the process.
Practise Edexcel GCSE Chemistry Electrolytic processes with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Chemistry (1CH0) 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.