Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
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).
How do you magnetize metal? You can rub a magnet with the metal in single direction for a bunch of times (the more the better), and that will magnetize it to some degree, but i
Calculate the density of sodium metal. The length of the body-centered cubic unit cell is 4.24 A.
A standing wave is described by the wave function where x and y are in meters and t is in seconds. (a) Prepare graphs showing y as a function of x for five instants: t = 0, 5 ms,
Draw and discuss Pentode Plate Characteristics. Ans: Pentode Plate Characteristics: Pentode plate characteristics (plate current-plate voltage curves at constant grid vol
A galaxy in the constellation UrsaMajor is receding from the earth at 15,000 km/s. If one of the characteristic wavelengths of the light the galaxy emits is 550 nm, what is the cor
Can an ordinary diode be used as a zener diode? Justify your answer. Ans Ordinary diode can't be used as a Zener diode, since ordinary diodes aren't operated in the rever
the unit of force and length are doubled, the unit of energy will be
A disc of mass m and radius R is attached to a rectangular plate of the similar mass breadth R and length 2R . Find moment of inertia of this system about diameter of disc. They ar
What does it signify to say that the electric potential is a function of x only? More exclusively what does the equipotential diagram (in 3-dimensional space) look like in the case
At 200.0 K, silicon has 3.79 x 10 -18 free electrons per atom. How many free electrons/cm 3 are there in silicon at this temperature?
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!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd