Question

Two cells of emf 1 V and 2 V and having respective internal resistances 2 Ω and 1 Ω are connected in parallel so as to send a current through an external resistance of 1 Ω in the same direction. Find the current through the cells and the current through the external resistance​

Answer 1

Answer:

For parallel combination,

Net emf, ε=

r

1

+r

2

ε

1

r

2

+ε

2

r

2

Net internal resistance ,r

int

=

r

1

+r

2

r

1

r

2

=2.25Ω