For a cell, the graph between the potential difference (V) across the terminals of the cells and the current I drawn from the cell is as shown in figure. Calculate the e.m.f. and the internal resistance of the cell.

Answer

(A)

Explanation

By using reduced mass concept this system can be reduced to
Where `mu=((3m)(6m))/(3m + 6m)=2m` and `F_1 =` Force on either block w.r.t. centre of mass of the system
`= F/2 + (3m)a_(cm) = F/2 + (3m)((F-F//2)/(9m)) = F/2+F/6=2/3F`
Now from wrok energy theorm, `2F/3x_m = 1/2Kx_(m)^(2) rArr x_(m) = (4F)/(3K)`