Final answer:
The voltage drop across the 6-ohm resistor is 12 volts.
Step-by-step explanation:
According to Ohm's law, the voltage drop, V, across a resistor when a current flows through it is calculated using the equation V = IR, where I equals the current in amps (A) and R is the resistance in ohms (Ω). In this case, the 6 ohm resistor is connected in parallel to the other resistors and the battery. When resistors are connected in parallel, the voltage drop across each resistor is the same as the voltage across the whole circuit. Therefore, the voltage drop across the 6-ohm resistor is 12 volts, the same as the battery voltage.