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WorksheetsElectricity and Magnetism
Total questions: 20
Worksheet time: 10mins
Do magnets have to make contact with an object to attract or repel it?
Yes
No
Students attached both ends of a long wire to the poles of a battery and wrapped the wire around a spoon. In this arrangement, the spoon is able to pick up five paper clips. The students wrap more wire around the spoon and want to determine if the strength of the magnetic force has increased. Which of the following observations would indicate that wrapping more wire has increased the strength of the electromagnet?
More wire was needed to wrap around the spoon.
The spoon now picks up seven paper clips.
Eventually, the battery runs out of energy.
The ends of the wire must touch the battery's poles.
The illustration shows a hand generator. Turning the handle of the generator spins a magnet and creates an electric current that lights the bulb. Which of the following observations can be used to indicate the strength of the current created by the generator?
The brightness of the bulb
The size of the magnet
The length of the handle
The mass of the generator
This table shows the magnitude of electromagnetic force exerted by two electromagnets on each other as the distance between the two electromagnets is varied. The data on the table provide evidence for which of the following conclusions?
The force between any two magnets is always constant, regardless of distance.
As distance between electromagnets increases, the electromagnetic force also increases.
The smaller the distance between two electromagnets, the greater the force.
The force between two magnets depends only on the charge of the electromagnets.
What is a current?
A directional flow of electrical charge through an object or medium
Attraction or repulsion that arises between electrically charged particles because of their motion
The size or quantity of something
Attractive or repulsive interactions between any two charged objects
What will happen as an electron (-) gets closer to a proton (+)?
The repulsion will be stronger.
The attraction will be stronger.
The attraction will be weaker.
Nothing will happen to the electric field.
A current flowing through a wire is surrounded by a
Electric Current
Magnetic Field
Electric Field
None of these
What will happen if the north ends of two magnets are placed near each other?
Both magnets will get weaker.
They will repulse (repel) each other.
They will attract each other.
Nothing will happen.
Describe one way you can make an electromagnet stronger.
Reduce the size of the iron core
Decrease the current
Decrease the energy source
Increase the number of loops in the wire
The buildup of charges on an object is called
Current electricity
Static electricity
Electromagnetism
Magnetic field
What type of material does not allow electrons to flow easily?
Semiconductor
Conductor
Insulator
Circuit
What is a circuit?
The buildup of electric charges
A complete, closed path through which electric charges flow
Opposition to the flow of charge
Electric potential
Which of the following could be used as an insulator?
plastic plate
silver spoon
copper wire
gold necklace
Xavien, Hallie, and Myron are comparing the voltage of their circuits. Which student's circuit contains the greatest voltage?
Henry's circuit with a current of 20 amps and a resistance of 16 ohms
Grace's circuit with a current of 10 amps and a resistance of 10 ohms
William's circuit with a current of 25 amps and a resistance of 16 ohms
Henry's other circuit with a current of 20 amps and a resistance of 10 ohms
Which of the following objects would NOT be a good insulator of electric charge?
skin
wood
plastic
rubber
Opposite charges _____. Like charges ______.
repel, attract
attract, repel
attract, attract
repel, repel
Electric charges flow from ____ voltage to _____ voltage
low to low
high to high
low to high
high to low
To increase the current, you should ____ voltage and _____ resistance
increase, increase
increase, decrease
decrease, decrease
decrease, increase
Which of the following can make an the electromagnet stronger? (Choose all)
Add more wire coils
Wrap the wires closer together
Add another battery
Space the wires farther apart
Overlap the wires
