what is current?, Physics

Assignment Help:

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.


Related Discussions:- what is current?

Explain chemical potential of ideal gas, Explain Chemical Potential of Idea...

Explain Chemical Potential of Ideal Gas? Derive the expression for the chemical potential and Gibbs free energy of N molecules of an ideal gas at temperature T, pressure P and

Infrared radiations and ultra violet radiations, Infrared radiations and Ul...

Infrared radiations and Ultra Violet radiations: What are infrared radiations and Ultra Violet radiations? Ans: Infrared: Wavelengths larger than visible light 2. Wav

Can fiber be made any size, Can fiber be made any size? Well theoretica...

Can fiber be made any size? Well theoretically, yes. However, there are physical constraints due tothe materials and utility. Extremely large fibers have proportional bending r

Name the different methods of charging a battery, Different methods of char...

Different methods of charging a battery:  There are two general methods are employed for charging are:- A) constant current system and B) constant voltage system..

Illustrate examples of systems out of equilibrium, Illustrate Examples of s...

Illustrate Examples of systems out of equilibrium Examples of systems out of equilibrium: A) a stone thrown upwards that is at its highest point; B) a plane diving downwa

What is an intrinsic semiconductor, Q. What is an intrinsic semiconductor? ...

Q. What is an intrinsic semiconductor? Give any two examples. A) A semiconductor which is pure as well as contains no impurity is known as an intrinsic semiconductor. B) In

Beer lambert''s low, what is meant by positive deviation of beer lambert''s...

what is meant by positive deviation of beer lambert''s low?

Resistance, what are characteristics of resistances

what are characteristics of resistances

Entropy, #how entropy tells which process is spontaneous and which is non s...

#how entropy tells which process is spontaneous and which is non spontaneous.i also wana know that although 2nd law of thermodynamic is for heat engine and heat pump how it is rela

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd