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

Draw the logic circuit of this combination of getes, The output of an OR ga...

The output of an OR gate is linked to both the inputs of a NAND gate. Draw the logic circuit of this combination of getes and write its truth table.  Illustrate a plot of potent

Decade resistor, DECADE resistors are wire wound resistors. These are wound...

DECADE resistors are wire wound resistors. These are wound on cards moulded on round a switch of low contact resistance. Alloys used for wire are Manganin, minalpha, etc. Bifilar w

Interference and diffraction, INTERFERENCE and DIFFRACTION: INTERFEREN...

INTERFERENCE and DIFFRACTION: INTERFERENCE: The physical effect of super position of waves from two sources vibrating with same frequency and amplitude is called the interfere

What is neutral buoyancy, What is neutral buoyancy? Buoyancy is the net...

What is neutral buoyancy? Buoyancy is the net upward force experienced by an object submersed in a fluid. Pascal's principle dictates that fluid pressure on an object enhances

Experiment of simple ''spring'' balance, Simple 'spring' balance Punch ...

Simple 'spring' balance Punch four holes in an old tin lid with a nail, spacing them partially round the circumference. Pass pieces of string by these holes and tie them togeth

Semiconductor and data storage of electron microscopy, Explain semiconducto...

Explain semiconductor and data storage of electron microscopy. Semiconductor and data storage a. Circuit edit b. Defect investigation and c. Failure analysis.

P-n junction diode:depletion region, When a P-type semiconductor is suitabl...

When a P-type semiconductor is suitably joined to an N-type semiconductor, then resulting arrangement is called P-N junction or P-N junction diode Depletion region : On account

Electrostatics , Y the charge n voltage. Remain constant ven we connect cap...

Y the charge n voltage. Remain constant ven we connect capacitors in series. N parallel. Respectively??

What are the advantages of fibre optic communication, What are the advantag...

What are the advantages of fibre optic communication? Advantages of fibre optic communication are as follows: a. Enormous band width Coaxial cable transmission of 500 M

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