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

Motion, the average speed of an object over a given time duration is 6 m/s....

the average speed of an object over a given time duration is 6 m/s. If it travels first half of the duration with a constant speed 4 m/s, its speed during the next half duration is

Force, give some examples of like and unlike parallel forces

give some examples of like and unlike parallel forces

Define q- factor, Q. Define: Q- factor. The Q factor of a series reson...

Q. Define: Q- factor. The Q factor of a series resonant circuit is described as the ratio of the voltage across a coil or capacitor to the applied voltage. That is Q = voltag

What is an optical fibre, Q. What is an optical fibre and dispersion? Write...

Q. What is an optical fibre and dispersion? Write the expression for angle of deviation.

Pressure, 3 scenarios: You have an object such as a jar, and you submerge i...

3 scenarios: You have an object such as a jar, and you submerge it under water to 50m depth. (Every 10m down increases pressure by 1 bar, thus the pressure is 5 bar). Scenario 1:

Electromagnetic waves, Electromagnetic waves: Electromagnetic waves wi...

Electromagnetic waves: Electromagnetic waves with different ranges of frequency constitute an electromagnetic spectrum. Electromagnetic waves are transverse in nature. Visible

How to find the acceleration of a body , How to find the acceleration of a ...

How to find the acceleration of a body in a non inertial frame on the action of friction? Solution) Use the concept of pseudo force. Multiply  the mass of the body of which you

MULTIPLEXERS, . Design a 32:1 multiplexer using two 16:1 multiplexers and o...

. Design a 32:1 multiplexer using two 16:1 multiplexers and one OR Gate.

Angular Acceleration of the Earth around the Sung, What is the angular acce...

What is the angular acceleration of the Earth around the Sun? What equation is used to derive it?

Motor, illustrate the parts and function of motor

illustrate the parts and function of motor

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