Electricity 1
Jackie has an object with a positive charge on her desk. What will most likely happen if she places an object with a neutral charge near it?
The objects will move toward each other, because an electrically charged object is attracted to a neutral object.
Bar magnets are different from electromagnets because bar magnets...
Maintain a magnetic field at all times.
The pencil is both a conductor and an insulator. How this is possible?
The graphite inside the pencil is able to conduct electricity while the wood on the outside is not.
A __________allows heat and electricity to flow easily through it.
Conductor
An example of human harnessed electricity is
A. hair sticking up after you take off a sweater B.statically shocking your friend with your finger C.a field of turbines producing electricity from wind
C. A field of turbines producing electricity from wind.
If you were creating an electrical circuit and ran out of wire, which of these materials would make a good substitute?
A. yarn B. licorice strings C. plastic knitting needle D. tin foil
D. Tin Foil
A student performs an investigation. She places a magnet next to a paper clip and watches it quickly become attracted. Next, she moves the magnet farther away, and the paper clip takes a little longer to become attracted. Then, she moves the magnet even farther away from the paper clip. The paper clip does not move.
The strength of the magnetic field.
A ___________ resists or slows the flow of heat and electricity.
Insulator
Why do linemen and electricians wear rubber gloves?
The rubber is an insulator and it blocks the flow of electricity, keeping the workers safe.
What do batteries provide in a circuit?
Energy
Which of the following correctly describes one way in which static electricity is different from the electricity used by humans to run things in their homes?
A. Static electricity is a quick release of energy.
B. Static electricity requires magnets and coils of wire. C. Static electricity flows at a constant rate.
D. Static electricity always goes in the same direction.
A. Static electricity is a quick release of energy.
A student is planning an investigation that will measure how the strength of a magnetic field changes with distance. She needs a material that will be attracted to her magnet. Which of the following are attracted to magnets? A. all wood B. all metals C. some wood D. some metals
D. Some metals
You are given a light bulb and some wiring. What do you still need in order to complete the circuit?
You also need a power source
I was wearing socks and walked across the carpet. When I got to the doorknob and reached to grab it and felt a shock. What caused this event?
a flow of charges created by friction between my socks and the carpet
What does a switch do for a circuit?
provides control
Maggie creates a circuit using a AA battery, wires, and a light bulb. When the battery dies, she replaces it with a stronger battery. What will most likely happen? A. The light bulb will not light up. B. The light bulb will shine brighter. C. The battery will become overloaded and explode. D. The wire will not conduct as much electricity.
B. The light bulb will shine brighter.
TRUE OR FALSE: Permanent magnets like bar magnets and horseshoe magnets are attracted to anything made of metal.
False
A circuit that only has one path for electricity to flow is called a__________
Series Circuit
A circuit that has more than one path for electricity to flow is called a-__________
Parallel Circuit
When a light bulb is lit in a circuit, you know...
Energy is evident
___________is the buildup of charges in one place.
Static Electricity
How could you test the strength of a magnet?
See if metal attracts through another object
How is static electricity different than human-produced electricity?
Static is a quick release of energy from a spark.
If a positively charged object moves toward a neutral object, what might happen?
They attract bc positively charged objects attract neutral
Why are most wires surrounded by plastic?
The plastic safely insulates the conducting metal inside