The resistance of an electrical component can be found by measuring the electric current flowing through it and the potential difference across it. This equation, called Ohm鈥檚 Law, shows the relationship between potential difference, current and resistance:voltage = current resistance
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What is the formula for OHM’s law?
Ohm’s law formula. The resistor’s current I in amps (A) is equal to the resistor’s voltage V in volts (V) divided by the resistance R in ohms (惟): V is the voltage drop of the resistor, measured in Volts (V). In some cases Ohm’s law uses the letter E to represent voltage. E denotes electromotive force. I is the electrical current flowing…
How do you Use Ohm’s law to find the current through resistor?
We now use Ohm’s law V = R I and the value of R to find the current when the voltage is 7.5. The graph below represents the voltage V across a resistor against the current I passing through the same resistor. What is the resistance of the resistor in the circuit?
What are the applications of Ohm鈥檚 law?
The main applications of Ohm鈥檚 law are: 1 To determine the voltage, resistance or current of an electric circuit. 2 Ohm鈥檚 law is used to maintain the desired voltage drop across the electronic components. 3 Ohm鈥檚 law is also used in DC ammeter and other DC shunts to divert the current. More …
What is R in Ohm鈥檚 law?
In the equation, the constant of proportionality, R is Resistance and has units of ohms, with symbol 惟. The same formula can be rewritten in order to calculate the current and resistance respectively as follows: Ohm鈥檚 law only holds true if the provided temperature and the other physical factors remain constant.