The circuit below shows a torch bulb and lead plates dipped in dilute sulphuric acid and a battery of emf 12V.
![circuit showing a torch bulb and lead plates](https://www.easyelimu.com/images/form_4_past_papers/Term_3_2021/Mocks_/physics/circuit_showing_a_torch_bulb_and_lead_plates.JPG)
- What would be observed if switch S1 is closed and S2 open? Give a reason for your answer.
- State what is observed when S1 is open and S2 closed.
- S2 was closed for sometime and then opened and S1 closed. State what was observed.