Current-carrying conductors, Electrical Engineering

Assignment Help:

Q. Current-carrying conductors?

Current-carrying conductors, when placed in magnetic fields, experience mechanical force. Considering only the effect of the magnetic field, the Lorentz force equation gives the force F as

F = BlI

when a current-carrying conductor of length l is located in a uniform magnetic field of flux density B, and the direction of the current in the conductor is perpendicular to the direction of the magnetic field. The direction of the force is orthogonal (perpendicular) to the directions of both the current-carrying conductor and the magnetic field. Equation is often used in electric machine analysis.

The principle of interaction is illustrated in Figure, in which ¯B is the flux density, ¯I the current, and ¯F the force. Shown in Figure (a) is the flux density ¯B of an undisturbed uniformfield, on which an additional field is imposed due to the introduction of a current-carrying conductor. For the case in which the current is directed into and perpendicular to the plane of the paper, the resultant flux distribution is depicted in Figure (b). It can be seen that in the neighborhood of the conductor the resultant flux density is greater than B on one side and less than B on the other side. The direction of the mechanical force developed is such that it tends to restore the field to its original undisturbed and uniform configuration. Figure (c) shows the conditions corresponding to the current being in the opposite direction to that of Figure (b).

556_Current-carrying conductors.png

The force is always in such a direction that the energy stored in the magnetic field is minimized. Figure shows a one-turn coil in a magnetic field and illustrates how torque is produced by forces caused by the interaction between current-carrying conductors and magnetic fields.


Related Discussions:- Current-carrying conductors

Managing change, Managing Change: 1 The prominent actors included in t...

Managing Change: 1 The prominent actors included in the change procedure in an organisation are Change Makers, Change Agents, Change Leaders and they play a strategic role in

Show npn common base amplifier, Q. Show NPN Common Base Amplifier? ...

Q. Show NPN Common Base Amplifier? This configuration is used for high frequency applications because the base separates the input and output, minimizing oscillations at h

Merits and demerits of stepper motor - stepper motor , Merits and Demerits ...

Merits and Demerits of Stepper Motor Followings  are the  merits and demerits  of stepper motors. Merits : a.They are compatible  with digital systems b.For the co

Asynchronous message passing and synchronous-message passing, Question: ...

Question: a) Differentiate between Asynchronous message passing and Synchronous-message passing. b) If keyboards are the predominant means of interface to human input, the

Zero flag - registers , Zero Flag - Registers If the  result of any  a...

Zero Flag - Registers If the  result of any  arithmetical  or logical  operation in the accumulator  is zero i ,e  all the bits  of accumulator  ( with  some exceptions )  are

Electrocardiogram, i av designed my circuit in proteus and written the java...

i av designed my circuit in proteus and written the java graphical code for analysis of the results....i need help on how i can run this circuit in proteus and get the results in t

Subtract registers and borrow from accumulator, Subtract Registers and Borr...

Subtract Registers and Borrow from Accumulator The  contents of the  register  and borrow  flag  are subtracted from   the contents of the accumulator and the  result is  store

Gis application architecture, GIS application architecture: GIS applic...

GIS application architecture: GIS application architecture should 1  Give a framework and the essential programming interfaces to enable complex GIS applications to be deve

Jfet amplifier, i want to know the all the three jfet in present and future...

i want to know the all the three jfet in present and future use and desing for each component

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