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  4. Four cells of identical emf E and internal resistance r are connected is series to a variable resistor. The following graph shows the variation of terminal voltage of the combination with current. The emf of each cell used is

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Q. Four cells of identical emf $E$ and internal resistance $r$ are connected is series to a variable resistor. The following graph shows the variation of terminal voltage of the combination with current. The emf of each cell used isPhysics Question Image

J & K CETJ & K CET 2011Current Electricity

Solution:

$ 5.6\,\,V $