Three cells of emfs `varepsilon_1=1.5 V, varepsilon_2=2.0 v and varepsilon_3 =3.0 V` having internal resistances `r_1=0.3 Omega r_2=0.4 Omega and r_3 =0.6 Omega` respectively are connected in parallel . Find out the equivalent emf and the equivalent resistance of a cell which can replace this combination.

Explanation

To find the equivalent EMF and equivalent resistance of the three cells connected in parallel, we can follow these steps:

### Step 1: Calculate the Equivalent EMF
The formula for the equivalent EMF (E_eq) in a parallel circuit with internal resistances is given by:

\[ \frac{E_{eq}}{R_{eq}} = \frac{E_1}{r_1} + \frac{E_2}{r_2} + \frac{E_3}{r_3} \]
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