The current travels end-to-end at high speeds; electrons move relatively slow over short distances. Which option correctly reflects this statement?

• A. End-to-end at high speeds; electrons move relatively slow over the entire length
• B. Near the speed of light; electrons move moderate over the entire length
• C. End-to-end at high speeds; electrons move relatively slow over short distances
• D. Near the speed of light; electrons move moderate over short distances

Answer: (A)

The speed of the current flow is about how fast the signal propagates along the wire, which is extremely fast—near the speed of light in the conductor. The electrons themselves, however, drift slowly in response to the electric field, moving only a very small distance over a given time and especially over short lengths. So the statement that the current travels end-to-end at high speeds while electrons move relatively slow over short distances is the accurate pairing. This reflects the distinction between signal propagation speed (very fast) and electron drift speed (much slower, with little displacement over short spans).