Current Potential Difference And Resistance Equation
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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 equation. 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. The unit of potential difference is the volt v which is equal to a joule per coulomb j c. Ohm s law as a predictor of current. As an equation this serves as an algebraic recipe for calculating the current if the electric potential difference and the resistance are known.
The resistance of an electrical component can be found by measuring the electric current flowing through it and the potential difference across it. Current i voltage v resistance r i amps v volts r ω for example. Yet while this equation serves as a powerful recipe for problem solving it is much more than that. You can calculate current using the given formula.
Find the current flowing through a 3 ω resistor when a potential difference of 30 v is applied. Potential difference can also be measured using the formula v ir where i is the current charge and r is the resistance. 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.
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.
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