explain about voltage, current and resistance.

tell about all the three terms in detail and distinguish between their properties.

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  • Voltage or potential difference between two points is defined as the energy required to move the charge from one point to the other. Current is the rate of charge per unit time. Resistance is the obstruction offered by the conductor to the flow of current. Resistance depends on the length, area of cross section and material of the conductor.
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  • voltage : voltage or potential difference is the energy required to move a  charge between two points in an electric field expressed in volts. current : the rate of flow of charge or charge per unit time or movement of charged particles(electrons) constitute current(i) expressed in ampere. resistance : opposition offered by a material for current flow through it is callled resistance(r) expressed in ohms.
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  • Voltage, also called electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field. The greater the voltage, the greater the flow of electrical current (that is, the quantity of charge carriers that pass a fixed point per unit of time) through a conducting or semiconducting medium for a given resistance to the flow. Current is the time rate of flow of electric charge, in the direction that a positive moving charge would take and having magnitude equal to the quantity of charge per unit time: measured in amperes. Resistance is the property of a conductor by virtue of which the passage of current is opposed, causing electric energy to be transformed into heat: equal to the voltage across the conductor divided by the current flowing in the conductor: usually measured in ohms
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  • Voltage, ( V ) is the potential energy of an electrical supply stored in the form of an electrical charge. Voltage can be thought of as the force that pushes electrons through a conductor and the greater the voltage the greater is its ability to “push” the electrons through a given circuit.
    Electrical Current, ( I ) is the movement or flow of electrical charge and is measured in Amperes, symbol i, for intensity). It is the continuous and uniform flow (called a drift) of electrons (the negative particles of an atom) around a circuit that are being “pushed” by the voltage source.
    Resistance, ( R ) is the capacity of a material to resist or prevent the flow of current or, more specifically, the flow of electric charge within a circuit. The circuit element which does this perfectly is called the “Resistor”.
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