Explain current and magnetic force, Electrical Engineering

Assignment Help:

Q. Explain Current and Magnetic Force?

The rate ofmovement of net positive charge per unit of time through a cross section of a conductor is known as current,

i(t) = dq / dt

The SI unit of current is the ampere (A), which represents 1 coulomb per second. In most metallic conductors, such as copper wires, current is exclusively the movement of free electrons in the wire. Since electrons are negative, and since the direction designated for the current is that of the net positive charge movement, the charges in the wire are thus moving in the direction opposite to the direction of the current designation. The net charge transferred at a particular time is the net area under the current-time curve from the beginning of time to the present,

1687_Current and Magnetic Force.png

While Coulomb's law has to do with the electric force associated with two charged bodies, Ampere's lawof force is concerned with magnetic forces associatedwith two loops ofwire carrying currents by virtue of the motion of charges in the loops. Note that isolated current elements do not exist without sources and sinks of charges at their ends; magnetic monopoles do not exist.


Related Discussions:- Explain current and magnetic force

Break over voltage of finger voltage - thyristor , Break over  voltage of...

Break over  voltage of Finger Voltage   The  minimum  forward voltage  when the gate  is opened  at which SCR  starts  conducting  heavily is called  the break over  voltage. To

Find the diameter of the antennas, Two stations, located on mountain tops 4...

Two stations, located on mountain tops 40 km apart, communicate with each other using two identical paraboloidal antennas with pencil beam- width of 1°, aperture ef?ciency of 0.8,

Explain ferrimagnetic magnetic materials, Explain Ferrimagnetic magnetic ma...

Explain Ferrimagnetic magnetic materials. Ferrimagnetic Materials: In such materials unequal magnetic dipoles are lined up anti-parallel to each other. And permeabilities are

Find the total current and total resistance, For the circuit in figure, fin...

For the circuit in figure, find: a)  Total resistance b)  Total current c)  Current flow through resistor 6Ω and 4Ω

Describe the two core-excited states, Using the optimized 6-311G(d,p) geome...

Using the optimized 6-311G(d,p) geometry determined in question 1, perform the following equivalent core calculations for any two inequivalent carbons of butadiene: (a) Equivale

Resistance of 800 m of copper cable of cross-sectional area, Find the resis...

Find the resistance of 800 m of copper cable of cross-sectional area 20 mm . Take the resistivity of copper as 0.02 Ωm.

Transistor as an amplifier, Transistor as an amplifier: Figure:...

Transistor as an amplifier: Figure:  Amplifier circuit, standard common-emitter configuration. The common-emitter amplifier is planned that is why a small change i

Find the percent voltage regulation of the transformer, Q. A 25-kVA, 2400/2...

Q. A 25-kVA, 2400/240-V, 60-Hz, single-phase transformer has an equivalent series impedance of 3.45 + j5.75  referred to the primary high voltage side. The core loss is 120 W. Whe

What is threaded system, What is Threaded system. Threaded system: At...

What is Threaded system. Threaded system: At times we require implementing an operating system which can process multiple threads. Many threads are handled through the kernel

Zener diode, where is a zener diode used in a car

where is a zener diode used in a car

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