Plz solve this and explain it in detail.
Solution,
For the parallel combination of cells, effective emf is E and effective internal resistance is .
This combination is in series with another cell of emf E and internal resistance, r.
Thus, the net emf of this mixed combination of 3 cells, Eo = E + E = 2E.
and
the equivalent internal resistance of this mixed combination of cells,
Thus, current across the load R is
Power dissipated by the resistor,
Thus,
Ans (3)
For the parallel combination of cells, effective emf is E and effective internal resistance is .
This combination is in series with another cell of emf E and internal resistance, r.
Thus, the net emf of this mixed combination of 3 cells, Eo = E + E = 2E.
and
the equivalent internal resistance of this mixed combination of cells,
Thus, current across the load R is
Power dissipated by the resistor,
Thus,
Ans (3)