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?

Surface tension, why does rain water boils faster than fresh water

why does rain water boils faster than fresh water

Define about the set-up of helium-neon laser, Define about the set-up of He...

Define about the set-up of Helium-Neon Laser. The laser radiations along with higher coherence, higher directionality and higher monochromacity can be obtained from this. But,

Are side emitting fibers with reflecting core more luminous, Are the side e...

Are the side emitting fibers with reflecting core more luminous? To answer this honestly is very much as trying to find out the sex of the angels. When a side emitting light gu

Explain electricity and static electricity, Explain Electricity and static ...

Explain Electricity and static electricity Electricity - study of stationary (static) or moving charges Static Electricitiy (Electrostatics) - electric charges at rest

The acceleration of a falling ball, The acceleration of a falling ball ...

The acceleration of a falling ball The change in speed per second of a moving body is called the acceleration. When it is constant as in the case of a ball falling under the ac

What are one dimensional wave , Energy is transferred in a one direction on...

Energy is transferred in a one direction only. Example : Wave propagating in a stretched string.

Necessity of a starter, Necessity Of A Starter For D.C Motors When moto...

Necessity Of A Starter For D.C Motors When motor is at rest, then N=0 and due to Eb  is directly proportional to N, so   At begin E b  =  zero Thus armature current at t

Thermodynamics, show that work is a path function not a property

show that work is a path function not a property

Equatorial line and neutral point, Equatorial Line and Neutral point: ...

Equatorial Line and Neutral point: Equatorial Line: The imaginary line joining the centre of mass  and perpendicular to the line joining the poles of a bar magnet is called th

Newton''s third law of motion, NEWTON'S THIRD LAW OF MOTION: This law c...

NEWTON'S THIRD LAW OF MOTION: This law can be described as "Actions and reactions are equal and opposite".                                  OR To every action there is a

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