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).
baryon decay The idea, predicted through several grand-unified theories, that class of subatomic elements called baryons (of which the nucleons protons & neutrons are members
Unit of Capacity: The unit of capacity of a capacitor is known as farad (f). It is given by a relation. q = cv.
A typical brick has dimensions of 20.0 cm x 10.0 cm x 5.0 cm and weighs 20.0 N. How does the pressure exerted by a typical brick when it is resting on its smallest side compa
Image Formation for Concave Mirrors - Case B To see an object in any kind of mirror, a person must sight along a line at the image of the object. Every person capable of seeing
Length contraction (relativity of length) is the length of a body moving with a relativistic velocity v = c relative to an observer is contracted by a factor in the direction of m
How can ultrasonic waves be detected Kundt’s tube method? Ultrasonic waves can be detected by Kundt’s tube. There at the nodes, lycopodium powder collects into the form of heap
Is it probable for the electric field to be non-zero at a point in space where the electric potential is zero? Ans: Regard as for instance the case of an electric potential
A see-saw lever Get a thick plank about 3 m long and bring it into the class room. Balance it over a box or some other suitable device and let the pupils experiment with the se
Under standard state conditions at 37 o C, a biochemical reaction : A ↔ B + C has an equilibrium constant K = 0.0422 mol/dm 3 . (i) Calculate the standard
A sky diver in free fall reaches a speed of 65.2 m/s when she opens her parachute. The parachute quickly slows her down to 7.30 m/s at a constant rate of 29.4 m/s 2 . During th
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