Magnetic Forces
The location of the strongest magnetic field is the ____.
magnetic poles
The forces exerted between electric charges at a distance is evidence that each charge is surrounded by an electric _________.
field
A light bulb powered by two D-cell batteries in a series will be _________, than a single D-Cell battery.
brighter
As the electric current through a wire _______, the magnetic field around the wire becomes stronger.
increases
The region around a magnet where the magnetic forces act is the ____.
magnetic field
________ charges attract.
Opposite
A material through which electrons can move easily is a _____.
conductor
Charged particles move through a conductor best describes an electric ______.
current
Changing of the current in a wire coils reverses an electromagnet’s north and south poles.
direction
the electrical potential energy difference between two places on an electric circuit.
voltage
Because of the magnetic field, magnets do not have to ______ to affect each other.
touch
An object with equal amounts of positive and negative charge is electrically _____.
neutral
In a circuit with the lights in a series, the bulbs will be __________ , compared to a circuit with one bulb.
dimmer / not as bright
By changing the current in the wire, you can change the ______ and direction of an electromagnet.
strength
a force of attraction or repulsion created by a magnet.
magnetic force
You can heat it and then let it cool it in a very strong magnetic field to make temporary magnet, made of magnetic material, a _________ magnet.
permanent
When an object has more negative charge than positive charge, the object is called _____.
electrically charged
Adding a battery to a circuit will create a ________ ________ difference in a circuit.
potential energy
Increasing the amount of current flowing through the wire coil of an electromagnet, the _________ _________ becomes stronger
magnetic field
an electric current that continually flows in one direction.
direct current
When an object that is made of magnetic material but is not a magnet comes in contact with a magnet its magnetic domains fall into alignment and it begins to_______ other objects made of magnetic material
attract
Normally, materials are electrically neutral because there are ____.
equal numbers of positively charged particles and negatively charged particles
A series of lights with a switch is considered a(n) ________ ________, when the switch is down and connected.
closed circuit
Increasing the current and the number of _____ can make an electromagnet stronger
coils / wraps
a material through which electrons cannot easily move.
electric insulator