Two batteries each of internal resistance 5  Ω and emf 10 V are connected in parallel. Find the equivalent resistance and emf for the system.

5/2 Ω, 10 V 5/3 Ω, 10 V 4/3 Ω, 5 V 2/3 Ω, 5 V

5/2 Ω, 10 V

$R_{eq} = \frac{R}{2} = \frac{5}{2}\Omega$ $E_{eq} = \frac{E_1r_2 + E_2r_1}{r_1+r_2} = 10V $