In electronic, we are keen on monitoring two fundamental amounts: the current and voltages in a circuit.
What is Current?
The term current refers to the quantity, volume or intensity of electrical flow. Current can be defined as the flow of electrons in a circuit. The units of current are thus coulombs per second or amperes, abbreviated as A. We us capital “I” as symbol of Current.
What is Voltage?
The work per unit charge expected to move some charge between two points is known as the voltage between those points. (In material science, this work per unit charge is identical to difference in electrostatic potential between the two points, so the term potential difference is used for voltage..) The unit of voltage is joules per coulomb or volts, shortened V.
What is Resistance?
Resistance is the measure of opposition to the flow of electrons in an electric circuit. Resistance is measured in Ohms symbolized by letter Ω.
Relation between Current, Voltage and Resistance in a circuit
Relation between Current, Voltage and Resistance in a circuit can be defined by the Ohms law.
Ohms Law
Ohm’s Law can be stated as mathematical equations, all derived from the same principle.
In the following equations
V = I X R
If any two values are known in circuit third value can be fined by this equation
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