Answer: 0.923 A.
- A 2.77 A
- B 1.38 A
- C 1.85 A
- D 0.923 A
Correct answer: D. 0.923 A
Explanation: The external resistance is 5 × 10/(5 + 10) = 10/3 Ω. Total current is 12/(1 + 10/3) = 36/13 A. The terminal voltage is (36/13)(10/3) = 120/13 V, so current through 10 Ω is 12/13 = 0.923 A.
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.