# In the following circuits, (Fig. 3.38), heat produced in the resistor or combination of resistors connected to a 12 V battery will be :

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In the following circuits, (Fig. 3.38), heat produced in the resistor or combination of resistors connected to a 12 V battery will be :

A. same in all the cases
B. minimum in case (i)
C. maximum in case (ii)
D. maximum in case (iii)

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In case (i), R_1 = 2 Omega, in case (ii), R_2 = 2 Omega + 2 Omega = 4 Omega and in case (iii), R_3 = (2 Omega)/(2) = 1 Omega.
Since P = (V^2)/( R), heat produced is maximum in case (iii).