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Hint
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Answer
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Balloons rubbed with the same materials... (attract/repel)
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repel
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Balloons and the materials they are rubbed with... (attract/repel)
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attract
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Balloons rubbed with different materials... (attract/repel)
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attract
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These effects are stronger when the objects are... (closer/further)
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closer
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Objects acquire electric _____ after rubbing
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charge
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Charged objects exert electric ____ on each other
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forces
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Electrons can transfer between objects, but ____ can't.
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protons
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This substance holds electrons well.
(Given they both start out as neutral, between it and a balloon, all the electrons from the balloon will move to this, leaving the balloon positive.)
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plastic
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Charge is _______.
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conserved
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A material through which charges will not move easily is called a(n)
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insulator
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A material that allows charges to move around freely is called a(n)
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conductor
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Any metal, human body, water & humid air are examples of...
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conductors
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Glass, wood, plastic, rubber, dry air, etc. are examples of...
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insulators
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_____ electrons are held together tightly in insulators, but move freely in conductors.
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Valence
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A neutral object can acquire charge through touch with a charged object is called charging by _______, resulting in same-charged objects.
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conduction
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A neutral object can acquire charge without touch near a charged object is called charging by ______, resulting in opposite-charged objects.
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induction
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Charged and neutral objects can attract by _______ a charge on the neutral object.
(Because electrons move freely in conductors, the attraction to the conductor is stronger)
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inducing
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_________ is neutralizing a charged object by connecting it with the Earth.
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Grounding
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Electric charge symbol is q, and units are the ______, represented by (C).
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coulomb
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Coulomb's force law is represented by F = k q1 q2 / r^2. What is k?
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9*10^9
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Q is the _____ value of the charges involved.
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absolute
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r is the _____ between the two charges.
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distance
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Remember to add ______ because force is involved
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direction
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Determine the force on the electron (-1.6*10^-19 C) due to the proton (1.6*10^-19 C) in the hydrogen atom (shown below)
(I can't get the diagram in here so r is 10^-10 m)
Include units and direction in your answer (using "to the")
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2.3*10^-8 N to the left
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When ______ get really close, the force between them gets really, really large!
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charges
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a property that pushes the current through the circuit (equivalent to gravity for a waterfall)
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Voltage
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Units for the last answer
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volts
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friction that impedes flow of current through the circuit (rocks in the river)
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Resistance
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Units for the last answer
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Ohms
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the actual “substance” that is flowing through the wires of the circuit (electrons!)
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Current
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Units for the last answer
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Amps
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Ohm's Law
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V = IR
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Series circuits have (one/many) current(s).
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one (IT=I1=I2)
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Series circuits have (one/many) voltage drop(s).
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many (VT=V1+V2)
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Roughly type out how resistors add with series circuits.
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RT=R1+R2...
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Parallel circuits have (one/many) current(s).
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many (IT=I1+I2)
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Parallel circuits have (one/many) voltage drop(s).
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one (VT=V1=V2)
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Roughly type out how resistors add with parallel circuits.
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1/RT = 1/R1 + 1/R2...
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Kirchhoff’s Junction Rule: The total current into a junction _____ the total current out of the junction.
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equals
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Current in Parallel Circuits only spilt evenly if the resistance is the ____.
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same
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You get (more/less) current in branches that have less resistance.
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more
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To deal with Series-Parallel circuits, you combine both parallel resistors into one, so it can be one side of a ____ circuit, then you solve as a series and use V = IR to find what you want
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series
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When drawing field lines, a positive field goes (towards/out from) the source.
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out from
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Negative fields go (towards/out from) the source.
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towards
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To draw a stronger charge, draw (more/less) arrows closer together.
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more
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Add vectors tip to ___.
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tail
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To find the total force on any single charge, you simply apply ______'s Law one by one for each of the other charges present, then add them!
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Coulomb
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Gravity and Weak Nuclear are weaker fundamental forces, while __________ and strong nuclear are stronger fundamental forces.
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electromagnetism
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Charging by _____ is the official term for transferring electrons between two objects through rubbing.
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friction
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