A resistor is an electronic component that is used to limit the flow of electrical current in a circuit. It is typically made of a material with high resistance, such as carbon, and is designed to dissipate energy in the form of heat.
To calculate the current through a resistor, you can use Ohm's law, which states that the current (I) is equal to the voltage (V) divided by the resistance (R). This can be represented by the equation I = V/R. The unit of current is amperes (A).
The current through a resistor is affected by the voltage applied across it, as well as the resistance of the resistor. Additionally, the temperature, material, and length of the resistor can also affect the current.
The potential difference, also known as voltage, across a resistor can be calculated using Ohm's law. You would take the product of the current through the resistor and the resistance itself. This can be represented by the equation V = I x R. The unit of potential difference is volts (V).
In a series circuit, the current through each resistor is the same, while in a parallel circuit, the current is divided between the resistors based on their individual resistances. This means that the total current in a series circuit is equal to the sum of the currents through each resistor, while the total current in a parallel circuit is equal to the total resistance divided by the sum of the individual resistances.
