The magnetic circuit, Physics

Assignment Help:

THE MAGNETIC CIRCUIT

In an electric circuit, a current is established due to the existence of an electromotive force. In the same way, in a magnetic circuit, a flux is established due to the existence of a magnetomotive force. The mmf is produced by the current flowing in the coil and its value is the product of the current and the number of turns on the coil.

Magnetomotive Force = Current x Number of Turns on the Coil

Note that, although mmf is quoted in ampere turns, the actual unit dimension is in amperes.

MAGNETISING FORCE

The magnetomotive force can be expressed in terms of the length of the magnet. It is then referred to as the magnetising force or magnetic field strength and given the symbol H. The magnetising force is a measure of the intensity of the magnetic effects at any given point in the magnetic field.

Magnetising Force (H) = Magnetomotive Force / Length of magnet

Note that:

• The unit of field strength is ampere per metre, although it may be quoted as ampere turns per metre.
• The length of a solenoid ‘l', is the length along its axis and not the length of wire from which the solenoid is made.

It will therefore be seen that a solenoid having 10 turns per metre carrying a current of 6A (10* 6 = 60 ampere/metre) will produce the same strength of magnetic field as one of 12 turns per metre carrying 5A (12 *5 = 60 ampere/metre).


Related Discussions:- The magnetic circuit

Kirchhhoff''s second law, I have a circuit and using Kirchhoff''s second la...

I have a circuit and using Kirchhoff''s second law I need to find the current across one of the battery. How should I do that?

Force mc falling time mars, Surface gravity on Mars is roughly 1/3 that of ...

Surface gravity on Mars is roughly 1/3 that of the Earth. Consider you drop a rock initially at rest from a height Hm on Mars and it takes a time tg to hit the ground. From what he

What is the molar depression constant for benzene, Two elements A and B for...

Two elements A and B form compounds having molecular formulae AB 2 and AB 4 . dissolved in 2O g of benzene, 1 g of AB2 lower the freezing point by 2.3 K, whereas 1 g of AB4 lowers

Explain how tunneling takes place in forward bias, Describe how tunneling t...

Describe how tunneling takes place    When  tunnel  diode  is  forward  biased,  its  initial  behaviour  is  similar  to  that when it's reverse biased. Now, some of the fille

Illustrates some way to by which ultrasonic waves propagated, Illustrates s...

Illustrates some way to by which ultrasonic waves propagated? Detection of Ultrasonic Waves: Ultrasonic waves propagated by a medium can be detected within a number of ways.

Illustrate double-beam oscilloscope, For the double-beam oscilloscope displ...

For the double-beam oscilloscope displays shown in Figure, determine (a) their frequency (b) their r.m.s. values (c) their phase difference. The 'time/cm' switch is on 10

A, what is electron

what is electron

#title.the number of pixels related to the actual phase, #question.i want t...

#question.i want to know the number of pixels related to the actual phase value in an image and want to separate the zero phase valued pixels from the image.

Determine the current is distributed uniformly over the rod, A copper rod w...

A copper rod which is 1 centimetre in diameter carries a current of 5 amps.  The current is distributed uniformly over the rod.  The magnetic field half way among the axis o

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