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

Operation of a transistorized phase shift oscillator, Q. Discuss the operat...

Q. Discuss the operation of a transistorized phase shift oscillator with the help of a diagram? Explain the phase shifting circuit? An oscillator is a circuit which converts elec

Explain low-frequency response of rc coupled amplifier, Q. Explain low-freq...

Q. Explain low-frequency response of RC coupled amplifier. What are the reasons for reduction in gain at low frequencies? The RC coupled amplifier circuit contains capacit

Define sampling at a very high frequency, Define Sampling at a Very High Fr...

Define Sampling at a Very High Frequency? By sampling at a very high frequency compared with the signal frequency, we can ensure that we do not miss important information. Anot

List the uses of usart, List the uses of USART. USART- Universal Synch...

List the uses of USART. USART- Universal Synchronous Asynchronous Receiver-Transmitters. It is used to transmit and receive the data in serial communication mode. It is

What are the currents in the high-voltage, Q. A transformer is rated 10 kVA...

Q. A transformer is rated 10 kVA, 220:110 V (rms). Consider it an ideal transformer. (a) Compute the turns ratio and the winding current ratings. (b) If a 2-load resistance

Distinguish between paramagnetic and diamagnetic materials, Distinguish bet...

Distinguish between paramagnetic and diamagnetic materials, mentioning at least one example of each. Paramagnetic Materials: The atoms of these materials have permanent magne

Discuss the term d/a conversion, Discuss the term D/A conversion. D/A...

Discuss the term D/A conversion. D/A conversion: Digital-to-analog or analog-to-digital conversions are two very significant aspects of digital data processing.  Digital-to-

Show quantization process, Q. Show Quantization process Let Figure (a) ...

Q. Show Quantization process Let Figure (a) illustrate a message f (t) with values between 0 and 7 V. A sequence of exact samples taken at uniform intervals of time is shown: 1

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