35) Joe set up the experiment as shown below. He noticed that the spring becomes shorter when the batteries were connected to both ends of the wire. (a) Give a reason for his observation. (2 marks) (b) One battery was then removed from the set-up. Will the length of the spring becomes longer, shorter or remains the same? Give a reason to your answer. \( (2 \) marks) I’m in 4th Grade. Science Question. Pls give a proper explanation.