Ohm’s law, Physics

OHM’S LAW:

So far you have been introduced to the concepts of electric current (as a movement of free electrons through a conducting material), voltage (or potential) and potential difference and to the resistance to current flow by any conducting material.  The relationship which exists between these quantities was discovered by a physicist called Ohm and is now referred to as Ohm's Law.  This is the most fundamental law in all electric's and electronics.

Ohm's law states: For a fixed metal conductor, with temperature and other conditions remaining constant, the current through it is proportional to the potential difference between its ends.

Mathematically this is expressed as:

                                      I ∝ V

Thus the ratio  V/I

and this ratio is called the resistance of the conductor.

Hence we may write  V/I  =  R       where V is in volts

                                                   I is in amperes

                                                    R is in ohms

 

Posted Date: 9/13/2012 2:18:05 AM | Location : United States







Related Discussions:- Ohm’s law, Assignment Help, Ask Question on Ohm’s law, Get Answer, Expert's Help, Ohm’s law Discussions

Write discussion on Ohm’s law
Your posts are moderated
Related Questions
The molecules of diatomic and linear polyatomic gases are made up of two atoms joined rigidly to one another by a bond. Such a particle cannot only move as a entire but can also ro

Reducing friction with pencils Place round pencils under a heavy box. Join a string to the box and find the force required to move it across a table. Search the force needed to


Schwarzschild radius The radius r of the event horizon for Schwarzschild black hole of mass m is provided through (in geometrized units) r = 2 m. In conventional units, r =

Dipole moment = product of magnitude of charge on any ONE OF THE ATOM and the distance between them.(e.d) Large Application in electrostats.To differentiate among Polar and non pol

Define Ideal Gas in One-Dimensional Potential? An ideal gas of particles, each of mass m at temperature ?? is subjected to an external force whose potential energy has the f

Q. State Kirchoff's second law in electricity? Kirchoff's second law (voltage law) the algebraic total of the products of resistance as well as current in each part of any

A horizontal ray hitting a prism with n=1.5, tip angle α=4 o . The ray will be deflected by an angle δ=(n-1)α. The ray is further reflected by a vertical mirror. Now, if I want to

Define the Intensity of the laser in short. Intensity: a. Lasers are intense and bright light sources. It is due to coherence and directionality. b. The  intensity  is  e

Describe the internals of a light-emitting diode (LEO). Describe what happens internally when sufficient current is applied to activate LED.  What isthe device pictured? Wh