will be investigated. Theory: Faraday’s law of induction states the induced emf or voltage in a coil is proportional to the rate of change of magnetic flux through a coil‚ this is shown blew: Ƹ= -dɸ/dt Equation 6.1 The flux of the magnetic field is defined and the following: ɸ=BAcosΘ Equation 6.2 B is the magnetic field at the location of the coil. A is the cross sectional area of the coil‚ and Θ is the angle between the field and the area A. There is several
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Saturable reactor or magnetic amplifier is a circuit that used to control very large load of AC with very small input DC. The saturable reactor consists of three essential elements : Direct current source‚ magnetic core with windings‚ and alternating current source. How it work? The AC load circuit run on to magnetic core and the DC control circuit is also went on to the same core. Ac current flows through winding and Since this current is alternating‚ the flux set up in the magnetic circuit loop is
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parts. When these two parts are joined‚ small air gasps are most likely to be formed. The stray magnetic field will arise around the air gaps formed. Due to the low magnetic stray field in the toroidal transformers‚ they are very useful when it comes to the critical applications such as medical equipment. Low magnetizing current. Toroidal transformers have low iron losses‚ and this makes the magnetic current in them to be significantly lower when compared to the convectional transformers. Due to
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Lecture notes by Prof. A. K. JAIN‚ IIT ROORKEE CHAPTER 13: The Deuteron (Lecture time: 2 Hours) Deuteron is the simplest nuclear system where nuclear forces come into play. It is the “Hydrogen Atom” of nuclear physics. It may also be viewed as the simplest odd-odd nucleus‚ having one proton and one neutron. It exhibits features which require the use of a number of new concepts such as exchange force‚ tensor force etc. Of three possible states of two nucleon system‚ di-neutron‚ di-proton‚ and deuteron
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2011 H I G H E R S C H O O L C E R T I F I C AT E E X A M I N AT I O N Physics Total marks – 100 General Instructions • Reading time – 5 minutes • Working time – 3 hours • Write using black or blue pen Black pen is preferred • Draw diagrams using pencil • Board-approved calculators may be used • A data sheet‚ formulae sheets and Periodic Table are provided at the back of this paper • Write your Centre Number and Student Number at the top of pages 9‚ 13‚ 15‚ 19 and 21 Section I Pages
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® keep it simple science ABN 54 406 994 557 (02) 6583 4333 PO Box 2575 PORT MACQUARIE NSW 2444 FAX (02) 6583 9467 www.keepitsimplescience.com.au mail@keepitsimplescience.com.au keep it simple science Photocopy Master Sheets Years 7-8 FORCES Disk filename = “02.Forces” Copying is permitted according to the Site Licence Conditions only 1 Site Licence Conditions Our product is supplied on CD • You may copy the CD for back-up only. • You may store the CD contents
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A.C. P7 Describe the properties and an application of two different magnetic materials commonly used in electrical and electronic engineering Task 1 By research and investigation; a) Identify and name two magnetic materials used in electrical engineering b) Give an application of each of the two materials c) Define two of the magnetic properties terms listed below: B-H curve*‚ retentivity (a.k.a. remanence)‚ coercivity (a.k.a. coercive force)‚ hysteresis‚ absolute permeability*‚ relative
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method for collection of data | | Total | | Aim: To study the effect of spacing of the coils on the strength of an electromagnet Apparatus Required: * An iron nail (around 8 cm) * A copper wire (15 cm) * Vernier Logger Pro * Magnetic Field sensor * Battery * Switch * Sand Paper Background Theory: Some metals such as nickel and iron can be magnetised using an electromagnet. The strength of the electromagnet depends on various factors which include the current‚
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with variable suction is considered. The fluid flow is unsteady and a variable magnetic field is transversely applied to the plate. Evaluation of velocity gradients‚ temperature gradients and concentration gradients across the plate is done. Observations and discussions of the effects of various parameters on flow variables are done. The non-dimensional parameters observed and discussed are Hall parameter‚ M; Magnetic number‚ M 2; Eckert number‚ Ec; Rotational parameter‚ Er; Suction parameter‚ S
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becomes a 3 ohms. What is the resistance of the resistor that was broken? Q.12> Using a suitable graph‚ explain why nichrome is used in standard resistance coils. Q.13> A velocity selector is to be designed for particles of velocity 10m/s. What magnetic field should be employed if the electric field in it
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