# Shared Flashcard Set

## Details

Electricity & Magnetism
N/A
75
Physics
05/16/2011

Term
 Electromagnetism controls the structure of all matter. Why?
Definition
 It hold everything together
Term
 Transferring a surplus of electrons from your body to another object is called an
Definition
 electric shock
Term
 What is the role of a transformer?
Definition
 To take a volt, and make into a lower volt
Term
 The science or study of lightnening is known as?
Definition
 fulminology
Term
 Why was the invention of the alternating current induction motor by Tesla so important?
Definition
 Not as many wires, More efficent to make electricity
Term
 Atoms that gain or lose electrons become charged particles known as
Definition
 Ions
Term
 Are materials in which charges (Electrons) can move freely?
Definition
 conductors
Term
 What is measured in ohms?
Definition
 resistance
Term
 The imbalance of and positive charges between objects when they are rubbed together is known as?
Definition
 static electricty
Term
 An electric charge in motion is called?
Definition
 electric current
Term
 What important event occured in the history of eletricity in 1600?
Definition
 Gilbert founded electricity
Term
 Give an example of an element that acts as a conducter?
Definition
 silicone
Term
 All matter is made up of atoms that contain negatively charged particles called?
Definition
 electrons
Term
 What is the relationship between amperes and electric charge?
Definition
 amperes is the measure of electric charge per-second
Term
 Who is given credit for developing the first battery in 1800?
Definition
 Volta
Term
 Electric charge is measured in units named?
Definition
 coulombs
Term
 The mathmatical formula that expresses the relationship between voltage, current, and resistance is?
Definition
 v=(1)(R) I=V/2 R=V/I
Term
 The branch of physics that deals with static electricity is called?
Definition
 electrostatics
Term
 Opposition to current is called?
Definition
 resistance
Term
 What important contribution did james Maxwell make to the progress of electromagnetism?
Definition
 Mathmatics of electromagnetism
Term
 What is voltage?
Definition
 is what pushes the electrons around
Term
 What are two types pf electrical force?
Definition
 repulsion, attraction
Term
 define the term " electricity"
Definition
 the flow of charged particles
Term
 the first electrical generater was developed by?
Definition
Term
 What is the connection between current and voltage
Definition
 if you increase the voltage, the current increases
Term
 An______Is any sunstance containing free ions that make the substance electrically condutvie.
Definition
 electrolite
Term
 Define "electron"
Definition
 is the controle of the flow of current in a circuit
Term
 What is cathode?
Definition
 A positive electrode
Term
 According to our notes, the electrical current in your house is 60 hertz. What does this mean in terms of frequincy.
Definition
 how many times it is going in and out per second.
Term
 Define electrical generaters in terms of energy transformation?
Definition
 is machanical energy being transformed into electric energy
Term
 An automatically operated electrical switch desgined to protect an electrical circuit from damage cause by overload or short circuit is called?
Definition
 Breaker
Term
 What is the function of a diode in a circuit?
Definition
 control the path
Term
 _______ is a unit of packaged electrical circuit
Definition
 chip
Term
 Explain the measurement of current in a parallel circuit
Definition
 it has many paths to travel and is the sum of all bads together
Term
 Define an electrical battery in terms of energy transformation.
Definition
 is taking chemical energy and transferring to electrical energy
Term
 The electric power company charges you for electric power by the?
Definition
 Kilowatt hour
Term
 Explain a 2 HP [horsepower] motor in terms of power or energy
Definition
 is 1492 watts
Term
 Define "electric power"
Definition
 is the rate of electricity changed into another form energy
Term
 Contrast wet and dry cell bateries?
Definition
 wet cell is liquid electrolites, dry cell is a paste like electrolites
Term
 A path between two or more points along which an electrical current can be carried is called a?
Definition
 circuit
Term
 Define electrical motors in term of energy transformation
Definition
 is taking electrical energy and transforming into mechanical energy
Term
 Contrast alternating and direct current?
Definition
 Alternating goes back and forth very quickly, Direct only flows in one direction
Term
 Wire gauge is measurement of?
Definition
 the thickness of a wire, the bigger the number = the smaller the wire.
Term
 Why is a wire gauge important in building circuits?
Definition
 to know which wire where and how much electricity can flow through it
Term
 A light bulb in a circuit is known as the?
Definition
Term
 What does the term "blowing the fuse" mean in terms of current in a circuit?
Definition
 to much voltage is flowing through the fuse
Term
 An abnormal low-resistance connection between two nodes of an electrical circuit that are meant to be at different voltages is called a?
Definition
 short circuit
Term
 What is an alternater?
Definition
 is generater of alternating current
Term
 The SI unit of the strength of the magnetic field is the?
Definition
 Tesla
Term
 Magnesium[Mg], molybdenum [Mo], and Lithium[Li] are three elemental examples of ____________ materials
Definition
 Paramagnetic
Term
 The magnet on a compass is generally called a?
Definition
 needle
Term
 How are magnetic line of force visualized?
Definition
 lines with arrows that go out the north pole end and go into the south pole end
Term
 The magnetic field of a magnet is created by the?
Definition
 movement of electrons
Term
 How is a simple electromagnet formed?
Definition
 the current of electrons through it and can be turned off and on
Term
 Define a "magnet"
Definition
 a material that produces a magnetic field
Term
 What is a dipole?
Definition
 a magnet that has two poles at opposite ends
Term
 ___________ materials are those tht show spontaneous magnetization?
Definition
 ferromagnetics
Term
 Fadays Law states that voltage will be "induced" in a coil when?
Definition
 the bigger the charge in the magnet field
Term
 Whats the function of earth's magnetic field?
Definition
 to attrack other objects away from hitting the earth
Term
 compasses on earth do not always point directly towards True North. Why?
Definition
 because the North pole is really the south and its not the geographic North pole
Term
 What is a "gause"?
Definition
 is a smaller way to measure the the strength of a magnet. 1T = 10,000 gause
Term
 Two regions of particular high concentration of changed particles that surround the earth are called the?
Definition
Term
 ____________ materials are slightly repelled by a magnetic field and do not retain the magnetic properties when the external field is removed?
Definition
 Diamagnetic
Term
 Contrast permanent and temporary magnets.
Definition
 Permanent once magnetized keep a degree of that magnetism, Temporary act like magnets when a strong magnet field is around it
Term
 The term magnetic field describes a volume of space where?
Definition
 A deterable and measurable charge of energy occurs
Term
 According current scientific theory, what is generating the planets magnetic field?
Definition
 The rotation of the core of the earth
Term
 The poles are the locations on a magnetic field where?
Definition
 Where they leave and enter & are the strongest part of the magnet
Term
 In ancient greeks and chinese knew about natural magnets, Rare chunks of iron-rich mineral known as?
Definition
 Lodestones
Term
 Every magnet has atleast one?
Definition
 North & South Pole
Term
 The magnetism in electromagnets is generated by?
Definition
 the current of electricity
Term
 ____________ materials are slightly attracted by a magnetic field and the material but do not retain the magnetic properties when the external field is removed?
Definition
 Paramagnetic
Term
 What is electromagnetic induction?
Definition
 Charges moving in a manet field create an electrical field
Term
 Earth's magnetic field forms a gigantic "bubble" in space around the earth. The magnetic bubble is called the?
Definition
 magnetosphere
Term
 In a series circuit, voltage is additive. Explain?
Definition
 the more batteries = the more voltage
Term
 Explain a 9-volt battery in terms of energy production?
Definition
 9 joules per-second
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