Answer: 15 V.
- A 5 V
- B 10 V
- C 15 V
- D 25 V
Correct answer: C. 15 V
Explanation: V = IR = 5 x 3 = 15 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.