When positive and negative charges no longer balance
What is Static Electricity
100
Copper, Silver and most metals. These materials made of atoms become charged more easily that others.
What are 3 good conductors of electric charge?
100
a force that acts on moving electric charge and magnetic materials that are near a magnet. It pushes or pulls magnetic materials.
What is Magnetism?
100
Earth. There is a magnetic north and south pole. These poles are not not located at its geographic poles.
What is the largest magnet in the world
100
magnetisim
When you feel the force of magnets this is called
200
An electric charge in motion
What is an electric current
200
plastic, rubber, glass and dry woods. These materials are made of atoms that do not become charged easily
What materials are electric insulators?
200
the invisible field around a magnet, it goes out in all directions.
What is a magnetic field?
200
Magnetic field
because of earths ? a compass needle points in a north-south direction.
200
iron
magnets stick of four kinds of metals nickel, steel, cobalt and ?
300
the material does not allow electric charges to flow through it easily.
What is resistance?
300
Parallel Circuit because if one bulb burns out the rest of the bulbs will stay lit.
Which circuits do most people use and why?
300
north-seeking pole and a south-seeking pole
What poles do magnets have?
300
changes the direction in which the compass needle points.
What happens if you put a magnet near a compass?
300
False
True of False: Earths magnetic poles and its geographic poles are in the same places.
400
a simple circuit where electric charge can flow only in one path. All devices wired into the circuit share the electric current eually.
What is a series circuit?
400
True: as charged particles move between atoms in storm clouds, the clouds become charged. Usually, the positive particles cluster near the top and the negative particles gather near the bottom of the clouds
True or False: Lightning happens because of the release of static electricity?
400
unlike charges (norht seeking, south seeking) attract each other. Like charges (north seeking, north seeking) repel each other.
what charges attract each other, which ones repel each other?
400
coil of wire with many loops through which an electric current passes. These are used to lift heavy objects, in machines used by doctors and nurses and in everyday gadgets such as tvs, computers and dvd players.
What is an electromagnet and how are they used?
400
False. The compass cannot be close to a magnet, otherwise the needle will respond to the pull of the magnet rather than to earth's magnetic field.
True or False: Compasses work best when they are close to magnets?
500
It has two or more paths for the electric harge to follow. A break in one part of the circuit does not stop the charge from flowing.
What is a parallel circuit?
500
It will get stronger.
What will happen if you increase the number of coils of wire wrapped around the core of an electromagnet?
500
each magnet piece has a north pole and a south pole.
If you break a magnet in half what happens to it?
500
wind, falling water, steam, nuclear energy heating the water. In each of these a meechanical energy spins wires around a magnet.
How are generators powered?
500
one end of a compass will always point to the north pole. It follows an imaginary line that connects the magnetic poles of earth.