Electrical stuff
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| What is the phenomena associated w/ stationary and moving positive and negative charges? | show 🗑
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| Two types of electricity: | show 🗑
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| Electricity in motion (dynamic charges) | show 🗑
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| Electricity at rest (stationary charges) | show 🗑
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| What is the study of stationary electric charges? | show 🗑
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| show | Coloumb (C) named after Charles Coloumb.
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| show | 1 C = 6.3 x 10^18 charges
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| show | Electrification
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| show | Added
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| To make a neutral object positive, are electrons added or removed from the object? | show 🗑
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| show | Electrostatic field
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| show | The same
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| show | The intensity (quantity) of the charge.
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| What will produce a large field, a small or big charge? | show 🗑
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| The planet Earth is considered to be an infinite ? for electrons. | show 🗑
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| show | Physically
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| show | Safety
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| show | Effective Lightning Protection
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| show | Deficiency
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| show | Electrons will move FROM the earth into the positive object until it is neutralized.
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| show | It is said to have too many.(an excess of e-)
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| show | Electrons will move from the negative object into the Earth until the object is neutralized.
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| Electrically connecting any charged object to the Earth(grounding) will ?? the object. | show 🗑
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| Electrical symbol for ground | show 🗑
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| Electrostatic Law #1 | show 🗑
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| show | On the external surface
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| The force between two charges is ? ? to the product of their magnitudes and ?? to the square of the distance between them. | show 🗑
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| Alternating current describes current that continuously ? direction as it moves through a substance. | show 🗑
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| show | Same
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| show | Negative
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| Which charges can only move through liquids, and gases? | show 🗑
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| show | Friction
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| Friction is also known as | show 🗑
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| Electrical charges will always follow the path of ? resistance | show 🗑
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| Any substance which permits electrical charges to move very easily through that substance. (very low resistance) | show 🗑
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| gold, silver, copper, aluminum are examples of... | show 🗑
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| show | Insulator
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| glass, rubber, plastic, wood are examples of: | show 🗑
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| show | Semiconductors
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| show | semiconductors
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| Superconductors are substances that have blank resistance when operated at extremely low temp. | show 🗑
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| Nobium and Titanium are known as: | show 🗑
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| show | Concept of conventional flow
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| show | Concept of electron flow
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| Electrician follow which concept of flow? | show 🗑
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| show | Electron flow
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| When one electron is inserted into one end of the conductor... | show 🗑
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| The source for external electrons is... | show 🗑
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| show | Kinetic
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| What causes the electrons to move in the conductor? | show 🗑
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| The force created between two locations (Potential energy difference) in the conductor is called the: | show 🗑
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| show | Voltage
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| show | Higher to lower. (more negative to less negative)
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| The movement will continue until a ? is established throughout the substance. | show 🗑
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| show | Volt
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| The number of electrons passing a given point per unit of time is a measure called: | show 🗑
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| Current Intensity is called the: | show 🗑
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| show | One coulomb of charge moving past a point per second. 6.3x10^18 charges
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| show | Resistance
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| show | Ohm
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| Resistance due to the characteristic electrical conductor material itself: | show 🗑
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| Factors affecting inherent resistance | show 🗑
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| show | Directly proportional (the longer the conductor, the more resistance)
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| What is the relationshiip of the cross sectional area to its' inherent resistance | show 🗑
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| Elements with what type of valence and how many shells will have a lower resistance? | show 🗑
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| As the temperature increases the inherent resistance: | show 🗑
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| what is a fixed resistance? | show 🗑
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| What is a variable resistance? | show 🗑
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| show | Fixed amount of resistance
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| show | Variable amount of resistance
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| show | Load
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| The purpose for any electric circuit is ? | show 🗑
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| Electric power is the product of ? | show 🗑
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| The formula of power= | show 🗑
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| show | Watt
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| Electric circuit is a closed complete ? pathway through whhich current can move. | show 🗑
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| show | Closed conductive pathpower supplyloadon-off switch
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| show | series, parallel, complex, short
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| Which three are functioning ciruits? | show 🗑
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| A series circuit provides only ? pathway to follow and where ? is constant at all locations throughout the circuit. | show 🗑
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| show | Voltage
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| If a circuit contains some loads that are in a series and others that are in a parallel the circuit is called ? | show 🗑
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| show | In series
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| If the total e- move through one load are not the same e- that move through another load than the two loads are said to be in | show 🗑
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| show | Insufficient added resistance
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| What has to be properly balanced for the circuit to operate correctly and safely? | show 🗑
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| The balance is determined by what law? | show 🗑
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| Ohm's law states: | show 🗑
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| show | I=V/R V=IR R=V/I
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| Ohm's law sates the relationship between? | show 🗑
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| show | Power, and current and voltage and resistance.
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| Watts formula: | show 🗑
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| What are the four effects of electric current? | show 🗑
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| show | Magnetic and thermal effect.
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| show | Thermal effect
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| Power loss (heat production) formula | show 🗑
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| Chemical Effect: | show 🗑
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| show | Dry cell and Wet cell
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| Dry cell battery has a moist chemical paste b/n two electrodes which creates chem. reaction and producing and emf of how many volts per cell? | show 🗑
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| show | 2.0 volts
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| Devices used to measure electrical current characteristics: | show 🗑
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| show | amperage
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| Voltmeter | show 🗑
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| Battery symbol | show 🗑
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| The ability of certain materials to attract iron: | show 🗑
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| show | Iron
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| Process whereby a certain material becomes a magnet | show 🗑
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| show | 3000 years ago
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| show | Present day Turkey (then called Magnesia)
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| The ore that was discovered was named | show 🗑
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| Magnetite is now called: | show 🗑
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| show | Compass
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| The compass was created during what time? | show 🗑
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| show | Peter Peregrinus
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| Who discovered that the planet Earth is one giant magnet during the 16h century? | show 🗑
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| show | Hans Oersted
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| show | Michael Faraday
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| show | Natural, artificial, and electromagnets
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| show | Lodestone and Earth
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| Artificial magnet is a manmade material that exhibits the property of magnetism. What is an example? | show 🗑
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| show | an electric current
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| show | Helix
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| show | Solenoid
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| A solenoid is also known as an? | show 🗑
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| When a rod of iron is placed through the center of the coil of the solenoid what is formed? | show 🗑
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| Magnetism law #1 states that regardless of shape/size every magnet has two poles: | show 🗑
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| show | Like magnetic poles repel each other, unlike magnetic poles attract each other
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| show | to the product of the strengths of the poles and inversely proportional to the square of the distance between the poles
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| Third magnetic law is sometimes called the: | show 🗑
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| show | maagnetic flux
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| the first flux property states that flux exits the | show 🗑
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| show | Flux leakage
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| show | cross over each other
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| Flux property 3 states that flux that travel in the same direction... | show 🗑
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| flux propety 4 states: | show 🗑
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| Whenever a magnetic material moves into the field of a magnet material becomes magnetized while remaining in the field is | show 🗑
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| show | if a mag is broken into 2 pieces each piece becomes a magnet
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| Weber's ob 2 | show 🗑
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| show | if a piece of iron is heated while near a mag it will become a magnet
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| Weber ob 4 | show 🗑
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| Web ob 5 | show 🗑
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| magnetic domain theory 1 | show 🗑
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| show | magnet
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| show | Magnetic field
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| MDT 2 a magnet is formed when all dipoles are: | show 🗑
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| show | the stronger the magnet
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| show | magnetized
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| When the dipoles are arranged in an orderly manner what is acquired? | show 🗑
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| a type of dipole | show 🗑
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| show | 1. e- moves around nucleus in an orbital path2. e- spins on it's own axis as it moves toward the nucleus (orbital and axial spin)
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| show | Magnetic field
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| show | Orbital magnetic momentSpin magnetic moment (axial)
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| Another dipole is: | show 🗑
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| As a proton spins on it's own axis what is formed? | show 🗑
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| show | Based on the spin structure of the atom within a given element resulting in magnetic moments
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| What determines the magnetic properties? | show 🗑
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| when the majority of valence e- travel in the same direction around the nucleus and spin in the same direction on their own axes | show 🗑
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| Atoms with a what valence electron number have more potential to become magnetic than those with a ? number of valence e-. | show 🗑
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| show | Pretty much none since the spin motions cancel each other
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| Atoms with a 7 valence e- with seven orbiting clockwise and 0 cc | show 🗑
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| show | demonstrate some magnetic properties but weak
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| Magnets of same substance can demonstrate varying degrees of | show 🗑
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| Magnetic strength depends on: | show 🗑
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| show | total number
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| the greater the flux intensity | show 🗑
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| show | Weber (Wb) 1 Wb=10^8 flux lines (100,000,000)
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| show | the greater the flux density the stronger is the magnet
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| Unit of flux density: | show 🗑
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| show | Gauss
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| 1T=10,000 G | show 🗑
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| e.g. of flux density | show 🗑
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| All elements can be classified according to the way they interact with an | show 🗑
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| what are the four magnetic classification of matter? | show 🗑
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| Ferromagnetic Material is any material that is ? attracted to a magnet | show 🗑
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| examples of ferromagnetic material are | show 🗑
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| show | Gadolinium
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| show | weakly
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| show | Beryllium, bismuth, and lead
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| Dimagnetic material (non-magnetic is any element which is not affected in any way by a magnet) examples are: | show 🗑
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| Permability also known as: | show 🗑
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| show | The easew/ which a substance can be magnetized
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| show | The ability of a magnet to retains it's magnetism.
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| Substances which are high in permeability are ? in retentivity | show 🗑
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| examples of high permeability: | show 🗑
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| Substances which are low in permeability are ? in rentivity. | show 🗑
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| examples of low permeability substances are: | show 🗑
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| show | L1/L2= R1/R2
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| show | A1/A2=R2/R1
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