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WorksheetsElectricity and Magnetism - Test Practice
Total questions: 19
Worksheet time: 30mins
What kind of electricity do you think should be used to power a new neighborhood that is being planned?
Static electricity, because it is a constant flow of electricity.
Static electricity, because it would be the easiest to control.
Current electricity, because it is free.
Current electricity, because it is easier to control.
Which item could be placed where the question mark is to complete the circuit?
wax candle
plastic marker
steel screw
fabric pillow
Which of these diagrams is a closed circuit?
A
B
C
D
Which of these is an example of human-harnessed electricity?
lightning striking a tree
accidentally shocking your cat when you touch her
using a flashlight
socks from the dryer sticking together
Abigail rubs two balloons on her wool sweater and lays them next to each other on her desk. What do you think will happen to the two balloons?
They will stay laying close together but not touching.
They will move toward each other and stick together.
They will touch each other and then pop.
They will push each other away.
Why would a circuit not work if one of the wires was replaced with a rubber band?
Rubber is a conductor, so the electricity would flow through it.
Rubber is an insulator, so the electricity would flow through it.
Rubber is an insulator, so the electricity would not flow through it.
Rubber is a conductor, so the electricity would flow through it.
Which of the following is ABSOLUTELY NECESSARY for a simple circuit to work? Check all that apply.
power source
conductor
load
switch
circuit breaker
Which of the following objects do you predict would be good conductors of electricity? Check all that apply.
book
styrofoam
paperclip
Lego
aluminum foil
Which of the following shows a complete circuit?
Why is the electromagnet on the left picking up more items?
Because the nail must be a permanent magnet.
Because there are more coils of wire around the nail.
Because the battery on the right is not as strong.
Because the circuit on the right is open.
Which of these ways is NOT a way that Earth is like a bar magnet?
It has a North and a South pole.
It has a magnetic field.
It is a temporary magnet.
It can attract magnetic objects, like a compass needle.
Why do you think that the doors in some schools are held open with electromagnets?
So that the doors can never be closed.
Because a regular magnet would not work on a wooden door.
Because electromagnets are permanent magnets, and they will hold the doors better.
So they can close automatically when the fire alarm goes off.
What are two ways this electromagnet could be made stronger?
Use a battery with a higher voltage (power output), and wrap more coils of wire around the nail.
Use a battery with a lower voltage (power output), and wrap more coils of wire around the nail.
Use a battery with a higher voltage (power output), and take some of the coils of wire off the nail.
Use a battery with a lower voltage (power output), and take some of the coils of wire off the nail.
Which of these correctly describes a SIMILARITY (how they are the same) of electromagnets and bar magnets?
They can both be turned on and off.
They both have a North and a South pole.
They are both permanent magnets.
They are both temporary magnets.
Which of these correctly describes a DIFFERENCE between electromagnets and bar magnets?
Only electromagnets are made of metal.
Only electromagnets produce a magnetic field.
Electromagnets are temporary, but bar magnets are permanent.
Electromagnets are permanent, but bar magnets are temporary.
What term do scientists use to describe the two opposite ends of a magnet, where the lines of the magnetic field come together?
borders
terminals
endpoints
poles
Which of these lists ONLY THE NECESSARY (needed) parts for an electromagnet?
battery, wire, bar magnet, nail
battery, wire, lightbulb, nail
battery, wire, nail, switch
battery, wire, nail
Which of these is an advantage of an electromagnet?
They do not need a power source.
They are always stronger than bar magnets.
They can be turned on and off.
They do not need a North and South pole.
Which of the following describes what these magnets will do when their South poles are brought together?
They will repel (push away).
They will repel (pull together).
They will attract each other.
They will turn off each other's magnetic field.
