Definitions
Electrical Charge:
Electric Field
Electric Field
Current
Electrical Circuits
Magnetism:
Magnetic Materials
Magnetic Materials
100
The amount of charge that travels past a fixed point in an electric circuit each second.
What is "Electric Current?"
100
The closer to a charged object, the (stronger/weaker) the force of its electric field.
What is "stronger?"
100
Electric current is measured in ______________.
What is "Amperes?"
100
Explain why an open circuit will not allow an electrical device to work.
What is " flow of electrons is interrupted, and energy cannot be transferred effectively." No current can flow.
100
All electrical charges attract or repel one another:
Like charges _________________, while opposite chargers ___________________.
What is "like charges repel" and "opposite charges attract?"
200
Current that flows from the positive side of the battery to the negative side. This is the way current is drawn in circuit diagrams, even though it is wrong.
What is "Conventional Current?"
200
When a glass rod is rubbed with a neutral silk cloth, the glass becomes positively charged.
What charge does the silk now have?
Why?
What is "negative charged?"
What is "gained electrons through Friction?"
Explained: As the glass rod was rubbed by the silk cloth, it lost electrons to the silk through fiction. This gave the silk cloth a net negative charge and the glass rod a net positive charge.
200
Current flows from (positive to negative OR negative to positive)?
What is "negative to positive?"
200
In most chandeliers today, when one light bulb goes out, the rest stay lit. Are the light bulbs wired in series or in parallel?
What is "light bulbs are wired in parallel?"
200
The force between the south pole of one magnet and the south pole of another magnet is measured. Would the force be (attractive or repulsive)?
What is "Repulsive?"
Since the poles are the same, this is a repulsive force.
300
The ability of a material to impede the flow of charge.
What is "Resistance?"
300
A physicist charges an object with a positively charged rod. If the object develops a negative charge, how did the physicist charge the object? Was it through Conduction OR Induction?
What is "Induction?"
Explained: The object developed a charge opposite of the rod. Thus, the object was charged by induction.
300
Any material through which electrons cannot flow easily.
What is "electrical Insulator?"
300
The measure of how hard a battery pushes electrons through a circuit.
What is "Voltage?"
Explained: The higher the voltage, the harder the push.
300
You cut a magnet in half right between the north and south poles. How many north poles and south poles do you now have?
What is "2 North poles and 2 South poles?"
Explained: As soon as the magnet is cut, each pole will change. Since it is impossible to have just one pole of a magnet, the north pole will change into a magnet with a north and south pole. The south pole will also change into a magnet with a north and south pole.
400
Charging an object by allowing it to come into contact with an object that already has an electrical charge.
What is "Charging by Conduction?"
400
What does the force between electrically charged particles behave similarly to?
What is "gravitational force?"
400
What is a material called that easily carries a current?
What is "A Conductor?"
Note: A conductor easily carries current. Insulators do not.
400
An electrical circuit is represented by a drawing like this:
The two unequal, parallel lines symbolize the ____________________________
The longer line represents the ______________
While the shorter line represents the _____________
What is "the two unequal, parallel lines symbolize the battery (or battery cell)
The longer line represents the positive side.
While the shorter line represents the negative side.
400
The atoms in an object are not aligned. Is the object a magnet?
What is "No, the object is not a magnet?"
500
Charging an object without direct contact between the object and a charge.
What is "Charging by Induction?"
500
A battery cell stores electrical charge by converting __________ energy to ____________ energy.
What is "converting chemical energy to electrical energy?"
500
Your are blindfolded and handed two extension cords of equal length. Both have the same current running through them. If the cord in your left hand is warmer than the one in your right hand, which cord is thicker?
What is "the cord in your right hand is thicker?"
Explained: The thicker the cord, the lower the resistance. The lower the resistance, the less heat will be made.
500
If a circuit has a low voltage, is there any way to get a lot of energy from it? If so, how?
What is "Yes?"
What is "as long as you put a lot of current through it?"
Explained: A low voltage means that each electron will have only a little bit of energy. You can still get a lot of energy out of the circuit, however, as long as you put a lot of current through it.
500
A cluster of many atoms whose magnetic fields align and so act as a magnet.
What is "Magnet Domain?"