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ELECTRICITY AND MAGNETISM

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  • What type of circuit is it?
    Series circuit
  • What is a conductor?
    A conductor is a material through which an electric charge can move easily.
  • Electric current that reverses direction is called........
    Alternating current
  • Complete the sentence. An object is negatively charged when it contains........ 
    An object is negatively charged when it contains more negative  charges than positive charges. (More electrons than protons)
  • What is the SI unit of charge?
    Coulomb (C)
  • Conductors have a high resistance.... TRUE OR FALSE?
    FALSE. Conductors have a low resistance, insulators have a high resistance!
  • In a series circuit, there is more than one pathway for charges to flow.... TRUE OR FALSE?
    FALSE. There is only one single pathway for charges to flow in a series circuit
  • What shows the strength and direction of an electric field?
    Electric field lines
  • What is the charge of an electron?
    (-e) = - 1.60 X 10^(−19) coulomb
  • When do two objects repel?
    Two objects with the same charge repel each other.
  • Magnetic field lines always form _______ loops
    Closed
  • In a parallel circuit, there is more than one path for current to flow.... TRUE OR FALSE?
    TRUE
  • Complete the sentence. An object is positively charged when it contains........ 
    An object is positively  when it contains more positive charges than negative charges. (More protons than electrons)
  • An object can have _______, ___________ or __________
    An object can have positively charged, negatively charged, or zero net charge.
  • What type of charge do electrons have?
    NEGATIVE
  • If a transformer decreases _________, it is called a step down transformer.
    Voltage
  • Some materials have zero resistance when their temperature falls below a critical temperature, these are called ________________.
    Superconductors
  • Electric field lines point towards a _________ charge and away from a ________
    Towards a negative, away from a positive.
  • Rank in order of least resistance to most resistance: conductors, insulators, superconductors, and semiconductors
    Superconductors-> conductors-> semiconductors-> insulators
  • Earth’s geographic north pole is actually a magnetic south pole..... TRUE OR FALSE?
    TRUE. Because opposite poles attract, Earth's north magnetic pole is actually a magnetic south pole and Earth's south magnetic pole is a magnetic north pole
  • Electric currents flow from _____ potential/voltage to ____ potential/voltage
    high to low
  • Identical poles ______ each other
    Repel
  • A circuit breaker is designed to close an overloaded circuit. True or false?
    FALSE. Circuit breakers OPEN an overloaded circuit and prevent overheating.
  • When do two objects attract?
    Two objects oppositely charged attract each other.
  • A generator transfers __________ energy to ___________ energy.
    mechanical to electrical
  • A motor transfers __________ energy to ___________ energy.
    electrical to mechanical
  • For the right hand rule, the fingers (not the thumb) represents the direction of the.......
    Magnetic Field
  • Objects with an excess of charge - either positive or negative - can have a charge removed by a process known as......
    Grounding
  • The electric _______ is the rate at which electric charges pass through a given area.
    Current. I = ∆q/∆t
  • Give an example of charging by induction
    Lightning. Induction charging is a method used to charge an object without actually touching the object to any other charged object
  • What is the SI unit of resistance?
    ohm (Ω)
  • Rubbing your socks on the carpet is an example of charging by…
    friction
  • What part of the atom is not inside the nucleous?
    ELECTRONS
  • What is the charge of a proton?
    (e) = 1.60 X 10^(−19) coulomb
  • Opposite poles ______ each other.
    attract 
  • All magnets have ______ opposite poles
    Two
  • Complete the sentence. An object with an equal number of positive and negative charges……..
    An object with an equal number of positive and negative charges has zero net charge. (We also say that the object is neutral).
  • For a magnet, the strongest magnetic force is located......
    Magnetic poles
  • An ____________ can be used to detect the presence of charge.
    electroscope
  • What type of circuit is it?
    Parallel circuit
  • What type of charge do protons have?
    POSITIVE
  • An electric force between objects increases when the _________ between them decreases.
    Distance
  • NAME 3 CONDUCTORS
    Metal, copper, iron, steel, water, aluminium, etc..
  • What's a insulator?
    An insulator is a material through which an electric charge cannot move easily.
  • NAME 3 INSULATORS
    Plastic, wood, glass, rubber, ceramic, fabric, wool, etc...
  • The rate at which charges move through a conductor is.....
    Current
  • Electrons flow from the positive terminal to the negative terminal.... TRUE OR FALSE?
    FALSE. Electrons flow from negative to positive!!!
  • ____________ is found by dividing the voltage across the conductor by the current.
    Resistance.   V=??
  • What is an electrical safety device that contains a metal wire which melts when too much current flows through it?
    Fuse
  • A lightning bolt occurs when billions of electrons are transferred at the same time.... TRUE OR FALSE?
    TRUE
  • What happen when two objects have zero/neutral charge?
    Two objects with zero net charge do not attract or repel each other.
  • What is elecricity?
    Electricity is the "flow" of electrons.
  • Why are lightning rods placed at the top of buildings?
    If lightning hits a building, it will strike the rod and be conducted to ground through a wire, instead of passing through the building.
  • What does the "k" stand for in Coulomb's law?
    Coulomb/electrostatic constant (8.99 X 109 N●m2/C2)
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