Final answer:
The twist ratio in twisted-pair wire is crucial for reducing electromagnetic interference and improving data transmission. Ensuring low current in the wires minimizes power loss, with higher voltage compensating to maintain power transmission.
Step-by-step explanation:
The twist ratio in twisted-pair wire affects data transmission by reducing electromagnetic interference and crosstalk between the wires. A higher twist ratio means the wires are twisted more tightly, which can decrease interference and improve signal quality for data transmission. However, there is a trade-off, as too high of a twist ratio can make the cable less flexible and harder to install.
Power loss in the transmission wires is a concern that must be mitigated to ensure efficient data transmission. According to the provided information, power loss (Plost) is proportional to the square of the transmitted current (Itransmitted) and the resistance of the wire (Rwire). Therefore, keeping the transmitted current low is essential to minimize power losses due to Joule heating, which is the generation of heat in the wire caused by its resistance to the current flow. To maintain the transmitted power (Ptransmitted), a higher voltage must be used when the current is kept low.