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?

Units and measurement.., the unit of force and length are doubled, the unit...

the unit of force and length are doubled, the unit of energy will be

Projectile motion, formula for height in a horizontal projection on an incl...

formula for height in a horizontal projection on an inclined plane?

Expermient of a general utility equal-arm balance, A general utility equal-...

A general utility equal-arm balance Make a base about 22 cm square from wood about 2 cm thick. Next make two uprights from wood15 cm long by 6 cm wide by 2 cm thick and join th

Explain independence of vectors quantities, Explain Independence of Vectors...

Explain Independence of Vectors Quantities Perpendicular vector quantities are independent of one another.  This means that the actions of one vector will not affect the action

Bar magnet, What is magnetic moment of a bar magnet 1. When a bar magn...

What is magnetic moment of a bar magnet 1. When a bar magnet of pole strength (m) and length (2l) is suspended freely in air,it always turns along the magnetic north (N) and S

Ferrites are which type of material, Ferrites are (A) Ferromagnetic ma...

Ferrites are (A) Ferromagnetic material. (B) Ferrimagnetic materials. (C) Anti ferromagnetic material. (D) Diamagnetic materials. Ans: Ferrites are ferro

Thermometers, what are advantages and disadvantages for the six''s thermome...

what are advantages and disadvantages for the six''s thermometer

ELECTROSTATIC ., two insulated charged copper spheres A and B of identical ...

two insulated charged copper spheres A and B of identical size have charge q and -3q respectably .when they are brought in contact with each other and then separated,what are the n

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