14.2-15.1
Whats a parallel circuit?
one that has two or more paths for the electricity to flow, the loads are parallel to each other
resistance definition
a measure of the opposition to current flow in an electrical circuit
Dimagnetic Materials
fields of individual electrons cancel with each other
What is Electromagnetism?
the interaction of electric currents or fields and magnetic fields
Whats AC current?
a type of electrical current, in which the direction of the flow of electrons switches back and forth at regular intervals or cycles
voltage definition
the pressure from an electrical circuit's power source that pushes charged electrons
paramagnetic materials
atoms become little magnets that don't cancel completely
What are Electric Motors?
a device used to convert electricity into mechanical energy
What's DC current?
electrical current that always flows in one direction
What is a circuit?
a closed loop that electrons can travel in
What is a compass?
an instrument which is used to find the direction of a magnetic field
The functions of a computer can be broken down into three basic steps. In which step does the CPU play a role?
processing information
What's electric current?
any movement of electric charge carriers, such as subatomic charged particles, ions, or holes
What is a capacitor?
a device that stores electrical energy by keeping positive and negative charge separated
What is magnetic declination?
the angle between magnetic north and true north on the horizontal plane
How many bits are used to write the word "congratulations" using the ASCII code
120 bits
definition of static electricity
a stationary electric charge, typically produced by friction
What is capacitance?
the measure of a capacitor’s ability to store charge. It is measured in farads
What is the source of the Earth’s magnetism?
electric currents in the liquid outer core
What is the difference between short-term goal & long term computer memory
Short term memory is erased when the power is turned off and long term memory retains its information