Answer: V = IR.
- A V = IR<sup>2</sup>
- B I = V x R
- C V = IR
- D R = V x I
Correct answer: C. V = IR
Explanation: V = IR. Voltage = Current x Resistance. This holds for ohmic conductors at constant 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.