what is current?, Physics

A simple electric circuit, where current is represented by the letter i. The relationship among the voltage (V), resistance (R), and current (I) is V=IR; this is called as Ohm''s Law.

An electric current is a flow of electric charge by an electrical conductor. Electric charge flows when there is voltage present across a conductor.
In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons like as in a plasma.

The SI unit for measuring an electric current is the ampere, which is the flow of electric charges by a surface at the rate of one coulomb per second. Electric current can be measured by using an ammeter.
Electric currents cause many effects, notably heating, but also induce magnetic fields, which are widely used for inductors, motors, and generators.

Posted Date: 3/7/2013 7:10:47 AM | Location : United States







Related Discussions:- what is current?, Assignment Help, Ask Question on what is current?, Get Answer, Expert's Help, what is current? Discussions

Write discussion on what is current?
Your posts are moderated
Related Questions
A battery of emf 2v and internal resistance 0.1 ohm is being charged with a current of 5A. In what direction will the current will flow inside the battery? Ans) In charging cond

while taking readings in a deflection magnetometer the deflection should be between 30 degree and 60 degree.why?

A man exerts a northward force of 100 newtons on a 50 kilogram box which sits on a level floor. If the frictional force is 80 newtons. What is the magnitude of the northward


A pendulum is timed, first for 20 swings and then for 50 swings Time for 20 swings= 17.4s Time for 50 swings= 43.2s Calculate the average time per swing in each case.

Details about halls effect

According to Rutherford's experiment when a sample of radioactive substance is place in a lead box and permit the emission of radiation by a small hole only. When the radiation ent

on newtons ring determine the refractive indexl of a liquid


Determinism principle It is the principle that if one knows the state to an infinite accuracy of a system at one point in time, one would be capable to know about the state of