The relationship between current and voltage across resistors is described by Ohm's Law, which states that the current through a conductor is directly proportional to the voltage and inversely proportional to the resistance. This means that as the voltage increases, the current also increases, but as the resistance increases, the current decreases.
The voltage across a resistor can be calculated using Ohm's Law, which states that voltage (V) is equal to current (I) multiplied by resistance (R). This can be written as V = IR. Therefore, if the current and resistance values are known, the voltage can be calculated by multiplying them together.
The unit of measurement for current is amperes (A), and the unit of measurement for voltage is volts (V). These units are named after the scientists who discovered their relationship - André-Marie Ampère and Alessandro Volta.
As mentioned before, the voltage and current have a direct relationship, meaning that the higher the voltage, the greater the current flow. This is because a higher voltage provides more energy to push the electrons through the resistor, resulting in a higher current.
The voltage and current across a resistor can be affected by the resistance of the material, the length and thickness of the resistor, and the temperature of the resistor. Additionally, the voltage and current can also be affected by the type of power source and any external factors such as magnetic fields or other electronic components.