Electric Current
material through which current flows easily
What is a conductor
two belts of charged particles located above Earth's equator that protect Earth from the solar wind
What are the Van Allen radiation belts
What is a switch
P=VI
What is the power of electric current
object capable of attracting materials by a magnetic force
What is a magnet
material through which current does not easily flow
What is insulator
the extent of a planet's magnetic field in space
What is the magnetosphere
device which transforms the energy of an electric current into another useful form of energy
V=IR
What is Ohm's Law
the region concentrated magnetism at the end of a magnet
What is a pole
neither good conductor nor goo insulator
What is a semiconductor
Earth's "north-seeking" pole
What is the south magnetic pole
circuit-protection device that uses a narrow strip of metal to prevent excessive current through a circuit
What is a fuse
see board Example 1.
What is the law of electric force
used to indicate the direction and strength of a magnetic field
What are lines of flux
material that allows current to flow through it with no resistance
What is a superconductor
the imaginary line that circles Earth halfway between the two magnetic poles
What is the magnetic equator
a circuit that contains complete path for electrons to flow through
What is a closed circuit
see board example 2
What is the total resistance
the extent to which a material can absorb or channel lines of flux
electrical device designed to hinder current flow
Whta is a resistor
streams of plasma that emanate from the sun, traveling at speeds of nearly 2,000,000km/h
What are solar winds
loads arranged in separate branches of the circuit and the current is divided among them.
What is a parallel circuit
see board example 3
What is parallel circuit
What is ferromagnetic