a) Which of the following is the proper representation of a series combination of cells to obtain a maximum potential?

A. i

B. ii

C. iii

D. iv

                                                                                             OR

 

b) Which of the following is the correct equation for voltage?  

A. work done ÷ (current × time)

B. work done × charge

C. (work done × time) ÷ current 

D. (work done ×charge)÷time

a) Maximum potential is obtained when cells are connected in series in such a way that the negative terminal of the cell is connected to the positive terminal of the second cell, and so on. Cells connected in series give a greater resultant voltage than individual cells. Voltage increases as the number of cells increases. 

Hence the correct option is (a) i. 

                                                                                                                         OR

b) As we know, 

work done = charge × potential difference 

Since, charge = current × time

Therefore, 

work done = (current × time) × potential difference

Or,

potential difference = work done ÷ (current×time)

Hence option a)

work done ÷(current×time)

is correct