Science, Chapter 13, Unit F Flashcards
(32 cards)
A region of magnetic force around a magnet
Magnetic field
A temporary agent created when current flows through wire wrapped in coils around an iron bar
Electro magnet
A power source that transforms electrical energy into movement, or mechanical energy
Electric motor
A device that creates alternating current by spinning an electric coil between the poles of a powerful magnet
Generator
One of two ends of a magnet; where a magnet’s pull is strongest
Pole
A material through which heat or electricity flows easily
Conductor
A material through which heat or electricity does not flow easily
Insulator
The buildup of an electric charge on a material
Discharge
A moving electrical charge
Current electricity
A circuit in which each bulb is connected to the cell separately
Parallel circuit
A complete path through which electricity can flow
circuit
A reusable switch that protects circuits from dangerously high currents
circuit breaker
A circuit in which the current must flow through one bulb in order to flow through the other
Series circuit
A device that melts to keep too much electric current from flowing through wires. Once melted, a fuse cannot be reused.
Fuse
An example of a good conductor
Metal
In homes electrical devices are connected in this type of circuit
Parallel circuits
Have tiny particles; some have a negative electrical charge and some have a positive electrical charge
Atoms
Like poles of a magnet do this
Repel
When current travels through the second transformer before entering your home, the transformer decreases this
Voltage
This type of current is produced by dry cells
Direct current
Name of the device that controls the current in a circuit
Switch
If you hear this you should: Get out of the water; don’t use the telephone; stay away from high places and tall objects
Thunder
Two objects connected to a cell in a single path
Series circuit
A complete path that electricity can move through
Circuit
