Introduction :
Electricity when flows through a circuit always have to experience opposition that is due to presence of a resistor in a circuit. Resistor can be arranged in series and parallel as well. Resistors oppose with the flow of electrons in a circuit. Sometimes this is essential to prevent damage to a component or circuit. A good example is an amplifier a resistor can keep the resistor getting hot. Without resistors to limit or control the current, the transistor might be overstressed carrying direct current that doesn’t contribute to the signal. The DC circuit analysis can be done using ohm’s law, Kirchoff’s law Thevenin’s theorem and Norton’s theorem.
Ohm’s Law :
Ohm’s law states that the voltage across a resistance is directly proportional to the current passing through it. A circuit element whose electrical resistance is basically resistive is called a resistor and is symbolized as shown in the following figure.
The mathematical correlation of Ohm’s law is given by the equation
V(t) = R x i(t), where R>=0
Or by the voltage current attribute as shown in the following figure.
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