Problem

Two cells of emf

E_1 = 6 \text{ V}

and

E_2 = 5 \text{ V}

are joined in parallel with same polarity on same side, without any external load. If their internal resistances are

r_1 = 2 \Omega

and

r_2 = 3 \Omega

respectively, then (a) terminal potential difference across any cell is less than

5 \text{ V}

(b) terminal potential difference across any cell is

5.6 \text{ V}

0.2 \text{ A}

(d) current through the cells is zero if

E_1 = E_2