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Current is the rate at which charge is flowing.
Resistance current and potential difference equation. So when we talk about these values we re really describing the movement of charge and thus the behavior of electrons. Resistance is a material s tendency to resist the flow of charge current. The formula for measuring potential difference is v w q and this formula is known as ohm s law. When a voltage v and resistance are given then you ought to use a formula for current.
This equation called ohm s law shows the. The resistance of an electrical component can be found by measuring the electric current flowing through it and the potential difference across it. The unit of potential difference is the volt v which is equal to a joule per coulomb j c. The equation v ir means that the potential difference or voltage across a resistor can be found by multiplying its resistance by the current flowing through it.
Current potential difference and resistance electrical current transfers energy around circuits. A voltage source is a device used in electric circuits that has a fixed potential. Voltage is the difference in charge between two points. In this equation v is equal to the potential difference w is the energy transferred or work done and q is the amount of the charge.
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