Answer: 0.1-1 mm/s.
- A 10<sup>8</sup> m/s
- B 10<sup>6</sup> m/s
- C 0.1-1 mm/s
- D Speed of light
Correct answer: C. 0.1-1 mm/s
Explanation: Despite fast random thermal speeds, drift velocity (net flow due to electric field) is very slow: ~0.1-1 mm/s.
In series, the same current flows through both resistors; in parallel, the current splits between branches and the voltage across each resistor is the same.
Concept context
Ohm's law, resistors, Kirchhoff's laws, Wheatstone bridge, and cells.