What is the formula for calculating current in a circuit?

The formula for calculating current in a circuit is derived from Ohm's Law, which states that the current (I) flowing through a conductor between two points is directly proportional to the voltage (V) across the two points and inversely proportional to the resistance (R) of the conductor. This relationship can be mathematically represented as I = V / R.

In this context, current (I) is measured in amperes (A), voltage (V) in volts (V), and resistance (R) in ohms (Ω). This equation shows that if you know the voltage applied to a circuit and the resistance in that circuit, you can easily calculate the current. For example, if a circuit has a voltage of 10 volts and a resistance of 5 ohms, you can find the current by dividing 10 by 5, resulting in 2 amperes.

The other choices represent different formulas that are also important in electrical calculations but do not directly answer the question about calculating current. For instance, the formula that represents resistance in terms of voltage and current (R = V / I) is a rearrangement of Ohm's Law. Similarly, the power equation (P = IV) relates power to current and voltage, and