Answer: 5 mA.
- A 5 mA
- B 10 mA
- C 15 mA
- D 2.5 mA
Correct answer: A. 5 mA
Explanation: The voltage across the series resistor = 15 − 10 = 5 V, so current = 5 V / 1 kΩ = 5 mA.
Conductors have overlapping bands, semiconductors have a small energy gap that can be bridged by heat or doping, and insulators have a large gap that blocks conduction.
Concept context
Band theory, p-n junction, diodes, transistors, logic gates, and integrated circuits.