Show:
Electricity 9.1-9.2
Electricity 9.3-9.4
Magnetism 10.1
Magnetism 10.2
Magnetism 10.3
100

How do two like charges interact when they are brought close to each other?

repel

100

What is the rate of electric charge flow?

current

100

What is the region of concentrated magnetism at the end of a magnet?

pole

100
What method of magnetism is used when a needle is magnetized by holding a magnet near the needle?

magnetizing by induction

100

What is the imaginary line that circles Earth halfway between the two magnetic poles?

magnetic equator 

200

What kind of electric field has an equal strength throughout? 

uniform field

200

What happens to resistance as the diameter of a conductor increases?

resistance decreases

200

What is an object capable of attracting materials by a magnetic force?

magnet

200
What is the resistance of a magnet to being demagnetized by another magnetic field? 

coercivity 

200

The Earth's "north seeking" pole is called the _____

south magnetic pole

300

What term describes an object with an equal number of positive and negative charges?

neutral

300

What circuit-protection device uses a narrow strip of metal to prevent excessive current through a circuit?

fuse

300

What are used to indicate the direction and strength of a magnetic field?

lines of flux

300
What force causes an electric charge moving through a magnetic field to deviate from its original path?

deflecting force

300

What is the extent of a planet's magnetic field in space?

magnetosphere

400

What moves when charge flows through an electrolyte?

ions

400

What is the most important factor affecting the ease of current flow through a wire?

material

400

The extent to which a material can absorb or channel lines of flux is __________

permeability

400

A material whose domains strongly resist changes in the direction of its magnetic field is described as magnetically _____.

hard

400

What are the two belts of charged particles located above the Earth's equator that protect Earth from the solar wind?

Van Allen Radiation Belts

500

A simple device that uses the laws of electrostatics to detect small electric charges is an

electroscope

500
What is a device that transforms the energy of an electric current into another useful form of energy?

load

500

What term describes a substance that has several unpaired electrons per atom and is strongly attracted to magnets?

ferromagnetic 

500

A substance that has no unpaired electrons and is slightly repelled by either pole of a magnet is a __________ substance

diamagnetic

500

What is the orientation of the lines of flux when the inclination at the magnetic poles is 90 degrees?

vertical