6
8
12
4
The correct option is (C): 12.
In the hexagonal close-packed (hcp) structure, the coordination number is 12. As zinc (Zn) adopts the hcp structure, it has 12 nearest neighbors, with six located within the same plane, and three situated above and three below that plane.
AB is a part of an electrical circuit (see figure). The potential difference \(V_A - V_B\), at the instant when current \(i = 2\) A and is increasing at a rate of 1 amp/second is: