hi 1. Which of these is not correct as a basic property of electric charges? (a) Total charges in an insulated system is invariable (b) A charged body is electrically unstable (c) * A charged body has equal number of positive and negative charges (d) Positively charged body is deficient of electrons x+q1+q2 = 2 q1 2.Calculate the distance x between charges q1 and q2 shown‚ given the repulsive force between them as 1.2 x 10-4 N‚ take the permittivity of vacuum
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Advantages 8 References 9 Magnetic Abrasive Finishing (MAF) Process Harry P. Coats first patented MAF in 1938. Although US originate this idea‚ most of later period development is done by USSR + Bulgaria. Japanese explore the technology for polishing purpose. Other countries in this field are: India‚ CIS‚ England‚ France‚ and Germany etc. Process details: • In MAP‚ w/p is kept between the two magnets & the air gap in-between the w/p & the magnet is filled with Magnetic Abrasive Particles (MAPs)
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“The Core” is a Hollywood movie centering around a plot of saving the world; a group of scientists and space pilot join together to nuke the core of the Earth into spinning again. Throughout the movie‚ there are several examples of good and bad science‚ including physics. 3 examples of bad science and 3 examples of good science are specified. One example of bad science in the movie was with the stopping of the Earth’s core. This is an example of bad science because it goes against conservation of
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according to the magnetic source‚ the magnetic separator can be divided to permanent magnetic separator and electromagnetic separator. 2‚ according to the strength of magnetic field‚ it can be divided into: (1) Weak magnetic separator‚ the surface magnetic strength HO=72-136 KA/m‚ magnetic force HgradH= (2.5-5.0) 1011 A/m. (2) Middle magnetic separator‚ the surface magnetic strength HO=160-480 KA/m; (3) Strong magnetic separator‚ the surface magnetic strength HO=480-1600 KA/m‚ magnetic force HgradH=
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Magnetic effect of electric current is one of the major effects of electric current in use‚ without the applications of which we cannot have motors in the existing world. A current carrying conductor creates a magnetic field around it‚ which can be comprehended by using magnetic lines of force or magnetic field lines. The nature of the magnetic field lines around a straight current carrying conductor is concentric circles with centre at the axis of the conductor. The direction of the magnetic field
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conductor‚ a magnetic field is immediately brought into existence in the space surrounding the conductor. It can be said that when electrons are in motion‚ they produce a magnetic field. The converse of this is also true i.e. when a magnetic field embracing a conductor moves relative to the conductor‚ it produces a flow of electrons in the conductor. This phenomenon whereby an e.m.f. and hence current (i.e. flow of electrons) is induced in any conductor which is cut across or is cut by a magnetic flux is
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Ampere’s Law The line integral of the magnetic flux around a closed curve is proportional to the algebraic sum of electric currents flowing through that closed curve; or‚ in differential form curl B = J. This was later modified to add a second term when it was incorporated into Maxwell’s equations. Archimedes’ Principle A body that is submerged in a fluid is buoyed up by a force equal in magnitude to the weight of the fluid that is displaced‚ and directed upward along a line through the center
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Prediction System of Magnetic Abrasive Finishing (MAF) On the Internal Surface of Cylindrical Tube Ching-Lien Hung1+‚ Wei-Liang Ku2‚ Lieh-Dai Yang3 Submitted to Materials and Manufacturing Processes March‚ 2010 This paper has not been published elsewhere nor has it been submitted for publication elsewhere. 1+‚ 3 Department of Industrial Engineering and Management‚ Nan Kai Universtiy of Technology‚ Nan Tou‚ Taiwan‚ R.O.C. 2 Department of Information Management‚ Nan Kai Universtiy
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Grade Details There are 2 pages in this exam: Page: 1 2 1. Question: (TCO 4) A body moving with an acceleration having a constant non-zero magnitude must experience a change in: Your Answer: Speed acceleration velocity CORRECT weight Instructor Explanation: Remediation: Knight‚ Chapter 1.6 Points Received: 6 of 6 2. Question: (TCO 4) A ball is dropped from a 250 foot building. How long before the ball hits the ground
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Lab V‚ Problem 8: Magnetic Force on a Moving Charge John Greavu Partners: Hannah Eshenaur and David Sturg August 15‚ 2013 Physics 1302W‚ Professor: John Capriotti‚ TA: Barun Dhar Objective In order to improve the design of an electron microscope‚ we attempted to use a magnetic field to control the electron beam. Utilizing a cathode cay tube (CRT)‚ we oriented a magnetic field perpendicular to the axis of the CRT’s electron beam. From previous experience‚ we decided on using Helmholtz coils to
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