1.

The two batteries of emf E_(1) and E_(2) having internal resistances r_(1) and r_(2) respectively are connected in series to an external resistor R. Both the batteries are gatting discharged. The above described combination of these two batteries has to produce a weaker current then when any one of the battery is connected to same resistor. For this requirement to be fulfilled.

Answer»

`(E_(2))/(E_(1))` must not lie between `(r_(2))/(r_(1)+R) and (r_(2)+R)/(r_(1))`
`(E_(2))/(E_(1))` must lie between `(r_(2))/(r_(1)+R) and (r_(2)+R)/(r_(1))`
`(E_(2))/(E_(1))` must lie between `(r_(2))/(r_(1)+R) and (r_(1))/(r_(2)+R)`
`(E_(2))/(E_(1))` mustnot lie between `(r_(2))/(r_(1)+R) and (r_(1))/(r_(2)+R)`

Answer :A


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