Notes On Resistor

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Recommended: The relationship between current, potential difference and resistance

2.1.1 RESISTORS
A resistor is a passive two-terminal electrical component that implements electrical resistance as acircuit element. Resistors act to reduce current flow, and, at the same time, act to lower voltage levels within circuits. Resistors are having fixed resistances or different resistances, which are found in thermistors, trimmers, photo resistors and potentiometers. The current through a resistor is directly proportional to the voltage across the resistor's terminals. This relationship is represented by I=V/R
Ohm's law: where I is the current through the conductor in units of amperes, V is the potential difference measured across the conductor in units of volts, and R is the resistance …show more content…

Fixed value resistor
2. Variable Resistor and Potentiometer: Variable resistor and potentiometer are those type of resistor whose value can be changed during its usage. These type of resistor usually contains a shaft which can be rotated or moved by hand or a screw driver to change its value in between a fixed range. Now the method of calculating the value of the resistors is by comparing the color strips embedded on the component accordingly.

2.1.2 CAPACITOR

Capacitor is an electronic device that is used to store electrical energy. They are only used to store the electrons and they are not capable of producing them. There are mainly two concepts for defining capacitance. The electrical concept is given below.
Capacitance is said to be the capacitor’s storage potential. In other words, for an existing potential difference or voltage “V” across the plates, the capacitance is said to be the amount of charge “Q” stored in between the plates. Capacitance, C =

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