Question

Two cells of equal emf 50v and of internal resistances r1=5 ohm and r2=3 ohm are connected in series. This arrangement is connected to an external resistance 'x'

Answer 1

Resistance in series is equal to r1+r2+r3

R=5+3=8

R=8

V=IR

R=V/I

R=50/8

R=6.25ohm. Ans.