Two cells, each of emf E and internal re...

Two cells, each of emf E and internal resistance r are connected in parallel between the resistance R. The maximum energy given to the resistor will be, only when

Ball will not collide with the flag

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As horizontal velocity (i.e velocity along the surface) remains constant so required time `= (30)/(5) = 6s`

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ALLEN-CURRENT ELECTRICITY-EXERCISE-III

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