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Postby TGTS0907129» Ohm law of potential difference

Describe the Ohm law of potential difference


The various source of emf described above are all agencies for moving charges through a circuit at the expense of energy. This energy is converted in the circuit from electrical is mechanical energy; in a radio transmitter it is radiant energy. The most common conversion in circuits is from electrical energy to heart. This occurs because the electron are scatted a conductor, yielding some of their energy to add to the thermal vibrations of the atoms of the conductor. Various materials are widely different in their opposition to the flow of electrons, but, except for a few metals at temperature near absolute zero, all materials absorb energy when a current is maintained in them.

In 1826 Georg Simon Ohm discovered that for metallic conductors there is a substantially constant ratio of the potential difference between the ends of a conductor’s ratio is called the resistance of the conductor. This relationship is called Ohm’s law. In equation form,

(Potential difference)/Current=resistance(a constant)     
= V/I = R

The mks unit of electrical resistance is the ohm Ω which is the resistance of a conductor such that a potential difference of one volt will maintain a current of one ampere.

By TGTT30071258 on 9/28/2015 12:17:14 AM
TGTS0907129 on 9/27/2015 11:58:19 PM

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