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44 Cards in this Set
- Front
- Back
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Unit of charge is the....
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Coulomb, (represented by letter q in Coulomb's law formula)
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Letter for charge in Coulomb's Law is ....
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q
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F in Coulomb's Law is the force between.....
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two charges, q1 & q2
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Coulomb's Law constant is the letter ....
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K, (whose value can be found on reference pages)
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Coulomb's Law is identical to the structure of what other law of attraction?
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Newton's Law of Universal Gravitational Attraction
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What does it mean if the value for F n Coulomb's law is positive?
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Charges are alike and they repel
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What does it mean if the value for F in Coulomb's law is negative?
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Charges are opposite and they attract
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Where do you find the value for Coulomb's constant?
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Your reference pages
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If something loses charge, then something else must...
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gain the same amount of charge.
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Domed surfaces ____ charge.
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retain
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Pointed surfaces tend to ____ charge
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bleed off
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Electrons tend to ___ themselves from each other as far as possible.
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distance
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An _____ is a device that detects an electric charge by allowing its leaves to rise when charged.
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electroscope
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Circuits with all resistors "holding hands" are _____ circuits.
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series
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Circuits that look like resistors are in a "ladder" are ____ circuits.
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parallel
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To find the overall or effective resistance in a series circuit, what do you do?
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Add the resistor values
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To find the overall or effective resistance in a parallel circuit, what do you do?
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1/Re = 1/R1 + 1/R2 + etc..
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What letter represents "current" in circuit problems?
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I
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What letter represents the "potential" or electrical pressure in circuits?
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V
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What is the unit for current?
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A, amperes
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What is the unit for resistance?
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Ohms (Greek letter omega)
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Resistance in wires like having rocks in your ____ pipes.
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water
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How fast the electricity is moving is the ___ in a circuit.
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current
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The number of coulombs or charges per second is the ...
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current
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The number of joules per coulomb is the ....
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voltage
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Th number of joules per second is the ....
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power
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The unit for power is the....
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Watt, W
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The longer the wire, the ____ the resistance gets
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higher
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The narrower the wire, the ___ the resistance gets.
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higher
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The hotter the wiere, the ____ the resistance gets.
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higher
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A device that measures current is called....
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ammeter
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A device that measures electrical potential is.....
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voltmeter
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A device that measures resistance is an....
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ohmmeter
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A broken light bulb filament in a series circuit will cause the circuit to....
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open, and all current will stop
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If you know one voltage in a parallel circuit, then...
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you know all the rest of them; they are the same everywhere
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If you know the current in one place in a series circuit, then...
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you know the current all other locations; it's the same everywhere
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Voltage in series is calcultated as..
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V total = V1 + V2 + .....
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Current in parallel is calculated as....
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I total = I1 + I2 + .....
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Ohm's law is ...
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I = V / R
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V is ____ related to I
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directly
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I is ___ related to R.
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inversely
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V is ____ related to R.
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directly
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When current follows a "short circuit", wires get....
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hot and may catch fire
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Electricity tends to follow the path of...
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least resistance
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