Electric History
What is the etymology of "electricity"?
"Electricity" comes from Latin "electrum" or Greek "elektron", meaning amber
What is the unit of electric charge?
coulomb
A negative charge repels an object. What is the charge on the object?
Negative
What are the names of the three circuit rules?
The junction rule, the loop rule, and Ohm's Law
How much energy does it take to move 2 C of charge across a potential difference of +3 V?
6 J
Who was the famous scientist who developed the one-fluid model of electricity, and inadvertently assigned the electron a negative charge?
Benjamin Franklin
What's one way to collect a positive charge?
Rub glass with silk
A positive charge attracts an object. What is the charge on the object?
Negative OR NEUTRAL
When you add a very small resistor to a circuit in series, does the total current through the circuit increase, decrease, or stay the same?
Decrease
How much energy is RELEASED when 2 C of charge move down a -3 V potential difference?
6 J
Amber rubbed with wool or fur will attract small objects
What's one way to collect a negative charge?
Rub amber or plastic with wool or fur
OR
Rip Scotch tape from a tabletop
A charged plastic rod attracts an object. What is the charge on the object?
Positive OR NEUTRAL
When you add a very large resistor to a circuit in parallel, does the total current through the circuit increase, decrease, or stay the same?
Increase
How much current runs through a 50-Ω resistor when it is hooked up to a 1.5-V battery?
0.03 A
What are the etymologies of "resinous" and "vitreous" charge, and which one is positive?
Resinous = "from resin/amber"
Vitreous = "from glass"
Vitreous is positive
True or false: neutral objects do not interact with charged objects
False
What will happen if a charged plastic rod is brought close to a very light metallic ball on a string?
The ball will be attracted to the rod, touch it, and then be repelled by the rod.
How is a lightswitch wired in with the lights it controls; series, or parallel?
Series
A 5-V USB charger can put out 12 W of power. How much current can it put out?
2.4 A
Who is the LESS famous scientist who developed the one-fluid model of electricity?
William Watson
As far as we can tell, does the Universe have an overall positive, negative, or neutral charge?
neutral
If the distance between two charges is cut in half, by which factor does the electric force between them change?
Increases by a factor of 4
How is a circuit breaker wired in with the rest of the circuit; series, or parallel?
Series
How much power can an American power outlet with a 15-A circuit breaker put out?
1800 W