If the potential difference across a 12-ohm resistor is 4 volts, what is the current through it?A 0.3 AB 0.5 AC 3 AD 4 A

To solve this problem, we can use Ohm's Law, which states that the current (I) through a conductor between two points is directly proportional to the voltage (V) across the two points, and is inversely proportional to the resistance (R) between them. The formula is I = V/R.

Given: V = 4 volts R = 12 ohms

We can substitute these values into the formula:

I = V/R I = 4 volts / 12 ohms I = 0.33 Amps

So, the current through the resistor is approximately 0.33 Amps. However, this option is not available in the choices. The closest option to this answer is 0.3 A. Therefore, the answer is A: 0.3 A.