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?

State the uses of zinc sulphide, State the uses of Zinc sulphide Zinc s...

State the uses of Zinc sulphide Zinc sulphide has a lattice constant of 0.596nm . The sulfide ions are quite big (atomic radius 184 pm) relative to the size of the zinc ions (7

Determine the mechanical efficiency of the pump, An oil pump is drawing 25 ...

An oil pump is drawing 25 kW of electric power while pumping oil with ρ = 860 kg/m 3 at a rate of 0.1 m 3 /s. The inlet and outlet diameters of the pipe are 8 cm and 12 cm, respec

Explain efficiency, An electric motor with a load delivers 5.2 hp to its sh...

An electric motor with a load delivers 5.2 hp to its shaft (1 hp = 746 W). Under these conditions, it operates at 82.8 percent efficiency. a. How much current does the motor d

Laws of transverse vibrations in stretched strings, State and explain laws ...

State and explain laws of transverse vibrations in stretched strings. Describe how do you verify them using sonometer.

What is dielectric breakdown, What is dielectric breakdown? Explain briefly...

What is dielectric breakdown? Explain briefly the various factors contributing to breakdowns in dielectrics. Ans.: Electric Breakdown: When the electric field applied across

LOGIC, : Construct a regular proof to derive the conclusion of the followin...

: Construct a regular proof to derive the conclusion of the following argument: 1. (A & U) ~R 2. ~(~R v ~A) / ~U

Calculate the required to melt of potassium metal, Calculate the heat requi...

Calculate the heat required to melt 316.7kg of potassium metal at 336 K.   The enthalpy of fusion of potassium is 2.35 kJ mol -1 .

Find weight of picture frame, a picture frame is hanging by two verticle st...

a picture frame is hanging by two verticle strings the tention in the string are 3.8N and 4.4N find the weight of the picture frame

Explain the acoustic cavitation, Explain the acoustic cavitation. Acous...

Explain the acoustic cavitation. Acoustic Cavitation: Usually, cavitation is the phenomenon where largely and small empty cavities are generated into fluids that expand to l

Explain astigmatism, Astigmatism: In this defect the surface of eye is ...

Astigmatism: In this defect the surface of eye is not perfectly spherical. The eye has different focal point in dissimilar planes and image of an object is not focused clearly

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