Answer: 3 V.
- A 1 V
- B 2 V
- C 3 V
- D 6 V
Correct answer: C. 3 V
Explanation: R<sub>total</sub> = 6 ohm. I = 6/6 = 1 A. V<sub>3ohm</sub> = 1 x 3 = 3 V.
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.