Two cells with the same EMF ‘E” and different internal resistances r1 and r2 are connected in series to an external resistan

Two cells with the same EMF ‘E” and different internal resistances r₁ and r₂ are connected in series to an external resistance R. The value of R so that the potential difference across the first cell be zero is

(1) √(r₁ r₂)

(2) r₁+ r₂

(3) r₁ - r₂

(4) (r₁ + r₂)/2

Two cells with the same EMF ‘E” and different internal resistances r1 and r2 are connected in series to an external resistance R.

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