Electricity was noticed by people in history when _______ was rubbed generating static electricity.
glass
wood
metal
amber
Name the 2 opposites types of forces that Benjamin Franklin studied
Positive and Negative
What happened to the string on the kite of Ben Franklin's experiment?
Franklin was struck by lightning and rushed to the doctor
The string was too wet, nothing happened
The frayed ends of the string stood up
The kite caught fire
What are the 3 particles in an atom?
Protons, neutrons, electrons
In an atom, electrons travel around the nucleus. What can happen to electrons travelling in the outermost shell of the atom (valence electrons)?
These electrons can float to other atoms
These electrons can shield the atom from other atoms
These electrons can float into the nucleus
These electrons can change their charge
What do you call materials that can pass electrons from one atom to another?
Conductors
What do you call materials that don’t have free electrons to pass from one atom to another?
Insulators
How do you get the free electrons to move in one direction rather than randomly all over the place?
You put the conductor (wire) into a circuit with a power
You use rubber or plastic and hope that it works
You tell the electrons to go left or right
You hook a copper wire to a light bulb and back to start
What must happen for there to be electrical energy? (Energy you can use for things like light bulbs.)
The breaking apart of atoms
The bonding of molecules
The total balance of charge
The moving of charge
Another word for the movement of charge is
Voltage
In static electricity, which holds a more negative charge, human hair or plastic?
Plastic (man-made substances usually hold a more negative charge)
In a closed circuit, the electrons all move in one ____________ trying to get back to the other end of the battery.
direction
When the electrons are flowing in one direction,in order for there to be electricity, what are the protons doing?
Staying still
An electric field develops when electrons move in one direction in a closed circuit. At what speed does this electric field move?
Electrical fields always go the speed limit
It depends on the material of the conductor
The speed of sound
The speed of light
When an electric field is produced, what also happens involving magnets?
A magnetic field is parallel to the electric field
A magnetic field is at right angle to the elecrical field
A magnet will no longer stick to a fridge
A alien will be magnetized here from outer space
Which mastermind won the War of the Currents in 1880’s and which type of system won (in other words, what do we use today)?
Thomas Edison, DC (Direct current)
Thomas Edison, AC (alternating current)
Nikola Tesla, AC (alternating current)
Nikola Tesla, DC (Direct current)
