What formula is used to calculate current in a circuit?

The formula used to calculate current in a circuit is based on Ohm's Law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R) in the circuit. This relationship can be expressed as:

Current = Voltage / Resistance

This means that if you know the voltage provided by a power source and the resistance of the components in the circuit, you can calculate the current flowing through the circuit. The greater the voltage, the higher the current, and conversely, the larger the resistance, the lower the current will be.

Understanding this principle is fundamental in electronics and electrical engineering, as it helps predict how changes in voltage and resistance affect the current in a circuit.