The circuit diagram illustrates two resistors connected in series to a power supply. When the switch is closed, the voltmeter reads $3.0\text{ V}$. What is the resistance of resistor R?
- A$0.67\,\Omega$
- B$1.2\,\Omega$
- C$1.5\,\Omega$
- D$2.0\,\Omega$
Physics 0625 · IGCSE · Electric circuits