Questions [5 every electromotive force a potential difference? Explain. ls every potential difference an electromotive force? Explain. What are the advantages and disadvantages of connecting batteries in parallel? What are the advantages and disadvantages of connecting batteries in series? What would happen if you alter the polarity of one of the batteries in Fig. 8? If you wanted to increase the electromotive force and the maximum current? How many batteries would you use and how would you connect them to achieve this? Explain and draw a circuit diagram to support your answer. 7. You have a toy car that needs a total EMF of S V and internal resistance of 1.0 Q to run and are given four batteries: a. EMF = 3 V, Ra =1.0 9; b. EMF = 5 V, Rt =1.7 (2; c. EMF = 2 V, Rt =1.0 Q; d. EMF = 5 V, Rs =2.5 Q; Which two batteries would you pick and how would you connect them to achieve the required values to power the toy car? 99:59.\"? Fig. 8. Circuit set-up for two batteries connected in series