How does the impedance of a cable affect signal transmission?

The impedance of a cable plays a crucial role in how effectively signals are transmitted through it. When considering option B, the impact of impedance on power loss during transmission is significant. Impedance, defined as the opposition that a circuit presents to a current when a voltage is applied, can affect the amount of power that reaches the end point of the cable. If the impedance of the cable does not match the impedance of the connected devices, reflections can occur at the connections, leading to power loss. This mismatch can cause part of the signal to be reflected back towards the source instead of being transmitted effectively, resulting in decreased power at the receiving end.

Understanding this relationship is essential for designing and implementing efficient transmission lines, as selecting cables with appropriate impedance helps minimize losses, ensuring that more of the transmitted signal's power is delivered to its intended destination.

While other options address pertinent aspects of signal transmission, they do not directly focus on the fundamental connection of impedance to power loss as effectively as option B does.