problems on combination of resistors

How many types of combination of resistors are there and what are they ?

In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be

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

In the following circuits, heat produced in the resistor or combination of resistors connected to a 12 V battery will be

(a) Why does resistance increase in a series combination of resistors ? (b) Why does resistance decrease in a parallel combination of resistors ?

State the characteristics of the parallel combination of resistors.

Which option is correct for the following statements A and B? Statement A: The current passing through each resistor is the same in a series combination of resistors. Statement B: The voltage between two ends of each resistor is the same in a parallel combination of resistors.

Why is resistance less in parallel combination of resistors ?