Current is the flow of electric charge through a circuit, measured in amperes. Voltage is the force that drives the current, measured in volts. In other words, voltage is the potential energy that causes current to flow.
To calculate the current in a circuit, you can use Ohm's Law, which states that current (I) is equal to voltage (V) divided by resistance (R). So the formula is: I = V/R.
The current in a circuit is affected by the voltage, the resistance, and the type of material the circuit is made of. Other factors that can affect the current include temperature, length of the circuit, and the presence of any additional components such as resistors or capacitors.
Current flows from the positive terminal of a power source, through the circuit, and back to the negative terminal of the power source. This is known as a closed circuit. The direction of current flow is opposite to the direction of electron flow.
The most common way to measure current in a circuit is by using an ammeter. An ammeter is connected in series with the circuit, meaning that the current flows through the ammeter, and the device displays the current measurement. Other methods of measuring current include using a multimeter or a clamp meter.
