Final answer:
The statement that the Network Interface Card (NIC) is a type of communications hardware is true. However, the claim that high-voltage wires are wrapped in insulating material is false. Moreover, refraction's use in fiber optic cables to transmit signals is true.
Step-by-step explanation:
Network Interface Card (NIC)
The statement about the network interface card (NIC) being a type of communications hardware is true. A NIC is a hardware component that allows a computer or other device to connect to a network. It can either be integrated into the system board or installed as an add-on card. The NIC prepares, sends, and controls data on the network. It also translates data between the network and the computer.
To answer question 16, the statement that high-voltage wires are wrapped in insulating material is false. While these wires are indeed held aloft by insulating connectors, the wires themselves are not wrapped in insulating material because they are designed to withstand high voltages and the surrounding air provides enough insulation.
Regarding the refraction in fiber optic cables, question 12's statement is true. Refraction is the bending of light as it passes from one medium to another at an angle. This principle is used in fiber optic cables to keep the light signals inside the cable and guide them efficiently over long distances.