Two cells of voltage 10V and 2V and internal resistances 10Ω and 5Ωrespectively, are connected in parallel with the positive end of 10V battery connected to negative pole of 2V battery (Fig 3.8). Find the effective voltage and effective resistance of the combination.
Battery of emf 2V and internal resistance 5Ω is in parallel with battery of 10V and internal resistance 10Ω.
For parallel combination we know,
For effective voltage,
The equivalent circuit is given below.
2