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

Difference between cmp and sub instructions, Mention how do the following i...

Mention how do the following instructions differ in their functionality SUB: It performs changes the destination operand and the subtraction operation. CMP: Comparison instr

Humming , I am getting humming noice in speaker when I connect to laptop on...

I am getting humming noice in speaker when I connect to laptop on ac when I put it on dc (battery) it''s dispear . Please help

Determine the output voltage, Q. An inverting amplifier is designed with th...

Q. An inverting amplifier is designed with three inputs, v 1 , v 2 , and v 3 , as shown in Figure. Determine the output voltage. Then indicate how the circuit may be modified to pe

Write short note on common vs associated channel signalling, Q. Write short...

Q. Write short note on Common vs. associated channel signalling. Associated vs. Common channel signalling: Out band signalling suffers from very limited bandwidth. Both a

Resistors, Difference between linear and non-linear resistors

Difference between linear and non-linear resistors

3 phase meter, What is reading mechanism of a 3 phase meter?

What is reading mechanism of a 3 phase meter?

Construct the corresponding transfer function, Consider the following IIR f...

Consider the following IIR filter. The initial input data sequence is given by x n = [10 15 20 15 8 6 9 0 0 0] Construct a table that shows the corresponding signal values at

Explain the steps of the evolution of the microcontroller, Question: a)...

Question: a) Give one reason why a "subroutine" could be written into the body of the main program. b) With the help of the diagram below, write down the sequence of the ni

Dc motor - motor control , DC Motor The motor  which  require dc  supp...

DC Motor The motor  which  require dc  supply to drive them are called DC motors DC motor  consist  two types  of windings. a. Fields Winding b. Armature Winding

Obtain the value of rs, Consider and obtain the values for R S , R 2 , R 1 ...

Consider and obtain the values for R S , R 2 , R 1 , and R D . Apply the rule-of-thumb dc design procedure outlined in this section for a JFET with V P = 3V, I DSS = 20 mA, and 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