In figure "A" of the illustration, 12 volts is applied to the circuit where the resistance of R1 is 10 ohms and R2 is 10 ohms. what is the voltage across R2 when the switch is closed? EL-0020

Correct Answer: Option C — 6 volts

In a series voltage divider with two equal 10-ohm resistors, the applied 12 volts drops equally across each component. The voltage across resistor R2 is exactly half of the total applied voltage, yielding 6 volts in accordance with Kirchhoff's voltage law.