engineering recuitment ICAR Technician 2021 Mock Test (Re-Exam) Physics Current, Resistance and Electricity Work, Energy, and EMF
Consider two cells of emf ε1 and ε2 with internal resistances r1 and r2, respectively. The two cells are connected in parallel by connecting their positive terminals together and connecting their negative terminals together. The combination is equivalent to a single cell with emf given by:
1
(ε1 r2) / (r1 + r2)
2
(ε1 r2 + ε2 r1) / (r1 + r2)
3
(ε1 r1 + ε2 r2) / (r1 + r2)
4
(ε2 r1) / (r1 + r2)