A cell of emf epsilon and internal resis...

A cell of emf `epsilon` and internal resistance `r` is connected across a variable load resistance `R`. It is found that when `R = 4 Omega` the current is `1A ` and when `R` is increased to `9 Omega`, the current reduces to `0.5A`. Find the value of the emf `epsilon` and internal resistance`r`

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A cell of emf `epsilon` and internal resistance `r` is connected across a variable load resistance `R`. It is found that when `R = 4 Omega` the current is `1A ` and when `R` is increased to `9 Omega`, the current reduces to `0.5A`. Find the value of the emf `epsilon` and internal resistance`r`

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