What is the value of the current flow in an electric circuit where the voltage is 12 V and the resistance is 3 ohms?

To determine the current flow in an electric circuit, Ohm's Law is used, which is expressed as ( I = \frac{V}{R} ), where ( I ) is the current in amperes (A), ( V ) is the voltage in volts (V), and ( R ) is the resistance in ohms (Ω).

In this case, the voltage is 12 V, and the resistance is 3 ohms. Applying the values:

1. Substitute the values into the formula:

( I = \frac{12 , V}{3 , \Omega} )

2. Perform the calculation:

( I = 4 , A )

The correct value of the current flow in the circuit is 4 A. This calculation reflects a fundamental principle of electrical circuits, signifying that for every 1 volt applied across a conductor with a resistance of 1 ohm, 1 ampere of current will flow. Thus, when the voltage is increased while the resistance remains constant, the current also increases proportionately, confirming that 4 A is indeed the correct answer.