Physics Lab Report – C15 Title: Investigation of magnetic fields by search coil Objective: To use a search coil and a CRO to investigate the magnetic fields generated by alternating currents through a straight wire and a slinky solenoid. Apparatus: |Search coil 1 |Slinky solenoid 1 | |CRO 1 |Slotted
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What happens when you take two natural wondering parallel lines and force them to turn whilst still parallel? In a two dimensional perspective you will see two overlapping waves with a positive and negative parabola opposite from one another. In reality we would see a spiral. Imagine that these lines are instead two of the smallest forms of energy known as a photon and they are spiraling each other. When you reach distances of four hundred nanometres to seven hundred nanometres in between the photons
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Opportunity cost The true cost of something is what you give up to get it.(This includes not only the money spent in buying (or doing) the something‚ but also the economic benefits (UTILITY) that you did without because you bought (or did) that particular something and thus can no longer buy (or do) something else.) Factors of production The ingredients of economic activity: land‚ labor‚ capital and enterprise. Economic Development The scope of economic development includes the process and
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WORKSHEET # 3 1. In the magnetic system of the Figure below two sides are thicker than the other two sides. The depth of the core is 10 cm‚ the relative permeability of the core‚ ur = 2000‚ the number of turns N = 500‚ and the current flowing through the coil is i = 1 A. (a) Determine the flux in the core. (b) Determine the flux densities in the parts of the core. (c) Find the current i in the coil to produce a flux (φ=0.012Wb). 2. A circular ring of magnetic material has a mean length
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partly true‚ as the losses arising from magnetic leakage flux in various metal parts of a transformer constitute a significant part of the total losses. This component of total losses is called stray (additional) loss (Ps ). In addition‚ experts distinguish between the stray losses in the windings (winding eddy loss: eddy-current loss in conductors‚ and circulating-current loss in parallel strands) and outside the windings (stray 2 1 magnetic shield on the tank 2 yoke clamping
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LS TE S R S 1. Introduction 2. Magnetism and Electromagnetic principles 2.1. Permanent Magnets 2.2. Magnetic Field around Conductors 2.3. Magnetic Field around a Coil 2.4. Electromagnets 2.5. Magnetic Strength of Electromagnets 2.6. Electromagnetic Induction 3. Current Carrying Wires and Coils 3.1. Force on a Wire in a Magnetic Field 3.2. Force and Torque on a Coil in a Magnetic Field 4. Basic Motor Principles 4.1. The Commutator and Motor Action 4.2. Simplified Version of the dc
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Why is magnetic flux through closed surface zero while electric flux not? Gauss’ Law for Magnetism The net magnetic flux out of any closed surface is zero. This amounts to a statement about the sources of magnetic field. For a magnetic dipole‚ any closed surface the magnetic flux directed inward toward the south pole will equal the flux outward from the north pole. The net flux will always be zero for dipole sources. If there were a magnetic monopole source‚ this would give a non-zero area integral
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Generators. A generator is a machine that converts mechanical energy into electrical energy by using the principle of magnetic induction. DC generator or direct current generator generates a voltage when speed and flux are met. This machine is called a unidirectional (dynamo).It consists of the same basic elements as a simple AC generator like the multi-turn coil rotating uniformly in a magnetic field .The output of which is a series of emf pulses‚ all in the same positive direction resulting in an average
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Motors use the effect of forces on current-carrying conductors in magnetic fields Discuss the effect on the magnitude of the force on a current-carrying conductor of variations in: The strength of the magnetic field in which it is located • The magnitude of the force is proportional to the magnetic field strength. Thus‚ an increase in magnetic field strength will cause an increase in the force on the wire and a decrease in magnetic field strength will cause a decrease in force on the wire.
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2.1 Motors use the effect of forces on current-carrying conductors in magnetic fields 2.1.1 The motor effect The motor effect is where a force acts on a current-carrying conductor in a magnetic field. The right hand palm rule is used to find certain properties: fingers point to magnetic field‚ thumb points in DC direction and palm points to direction of the force. 2.1.2 Factors affecting the force acting on the current-carrying conductor Forces are experienced by the electrons in the conductor
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