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Home » Two cells of emf and , internal resistance and , connected in parallel. The equivalent emf of the combination is- (A) (B) (C) (D)
Two cells of emf \varepsilon_{1} and \varepsilon_{2}, internal resistance r_{1} and r_{2}, connected in parallel. The equivalent emf of the combination is- (A) \frac{\varepsilon_{1} r_{1}+\varepsilon_{1} r_{1}}{r_{1}+r_{2}} (B) \frac{\varepsilon_{1} r_{2}+\varepsilon_{2} r_{1}}{r_{1}+r_{2}} (C) \sqrt{\varepsilon_{1} \times \varepsilon_{2}} (D) \frac{\varepsilon_{1}+\varepsilon_{2}}{2}
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Two cells of emf \varepsilon_{1} and \varepsilon_{2}, internal resistance r_{1} and r_{2}, connected in parallel. The equivalent emf of the combination is- (A) \frac{\varepsilon_{1} r_{1}+\varepsilon_{1} r_{1}}{r_{1}+r_{2}} (B) \frac{\varepsilon_{1} r_{2}+\varepsilon_{2} r_{1}}{r_{1}+r_{2}} (C) \sqrt{\varepsilon_{1} \times \varepsilon_{2}} (D) \frac{\varepsilon_{1}+\varepsilon_{2}}{2}

Answer: Option (B)\frac{\varepsilon_{1} r_{2}+\varepsilon_{2} r_{1}}{r_{1}+r_{2}}

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