1.(a) What is the difference between the e.m.f. of a cell and its terminal voltage? (b) A cell of e.m.f. 2 V and internal resistance 0.15 delivers a current of 3 A to an external load. Calculate the...

1.(a) What is the difference between the e.m.f. of a cell and its terminal voltage? (b) A cell of e.m.f. 2 V and internal resistance 0.15 delivers a current of 3 A to an external load. Calculate the resistance of the load and the terminal voltage of the cell. 2. State the two common methods of battery charging and explain the difference between them. 3. Why do batteries perform less well at low temperatures?