Question

(a) state kirchhoff'srules and explain on what basis they are justified.
(b) two cells of emfs e1 and e2 and internal resistances r1 and r2 are connected in parallel. derive the expression for the (i) emf and (ii) internal resistance of a single equivalent cell which can replace this combination.

Answer 1

The circuit in fig shows two cells connevtef in opposition to each other ..cell ... The circuit in fig shows two cells connevtef in opposition to each other ..cell E1 is of emf 6 V and internal resistamce 2ohm the cell E2 i og emf 4V amd internal rwsiarance 8ohm Find potentisl difference between the points A and B.