Answer: Decreases (more charge carriers at higher T).
- A Increases linearly according to standard textbooks
- B Decreases (more charge carriers at higher T)
- C Stays constant in general practice as frequently described
- D First increases then decreases in most textbook accounts
Correct answer: B. Decreases (more charge carriers at higher T)
Explanation: Unlike metals, semiconductors have more charge carriers at higher temperature. Resistivity decreases with increasing temperature.
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.