An electrical circuit contains an aqueous electrolyte solution connected in series with a low-pressure gas discharge tube.
Which of the following correctly identifies the mobile charge carriers responsible for the electrical current in each of these two components?
In the electrolyte: positive and negative ions; in the gas discharge tube: positive ions and electrons
In the electrolyte: free electrons and negative ions; in the gas discharge tube: electrons and holes
In the electrolyte: positive and negative ions; in the gas discharge tube: free electrons only
In the electrolyte: free electrons only; in the gas discharge tube: positive and negative ions
