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WorksheetsPS Unit 5 Electricity and Magnetism
Total questions: 63
Worksheet time: 5hrs 30mins
What makes electromagnets different from regular magnets?
they can be switched off and on
they use less energy
they are more user-friendly
they do not pollute the environment
What is the device shown?
Solenoid
Electromagnet
Generator
Motor
What happens when a compass is moved near a strong magnet?
it points north
it points toward the magnet
it spins in circles
it doesn't move
Does adding loops of wire to a solenoid increase or decrease its strength?
Increase
Decrease
Both
Neither
___, ____, and ____ are magnetic metals.
Iron, Nickel, Cobalt
Copper, Chromium, Gadolinium
Aluminum, Iron, Copper
Cobalt, Mercury, Sodium
What is the device shown?
Electromagnet
Solenoid
Generator
Motor
When a current flows through a wire, it creates a _______ around the wire.
magnetic field
magnetic pole
compass
attraction
Which would NOT increase the strength of the magnetic field around a solenoid?
Adding more coils of wire
Adding an iron core
Connecting it to a battery
Reversing its orientation
Which three materials would allow you to build an electromagnet?
Battery, Wire, Nail
Battery, Tape, Paper
Wire, Nail, Paper Clip
Sandpaper, Tape, Wire
An electric current does NOT exist in ______ circuit.
a closed
a series
a parallel
an open
To complete the circuit, a wire should be placed from —
When the switch is closed the buzzer will sound because -
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
An iron nail wrapped with copper wire and attached to a battery makes —
Permanent magnet
Electromagnet
Compass
Metal magnet
Which object does NOT conduct electricity?
copper wire
iron nail
salt water
wood
Which circuit will not light the bulb?
What is static electricity?
a buildup of electric charge on something
a repelling between electrons
an electric circuit
a flow of protons
If a copper wire is attached to the positive and negative ends of the battery, what will be the effect?
an electrostatic discharge
an electric current
a power source
static electricity
Hector rubs a comb with a wool cloth. Next, he holds the comb near, but not touching, some bits of paper.
Which of the following is most likely to happen?
A spark jumps between the paper bits and the comb.
The paper bits move away from the comb.
The paper bits are not attracted to the comb.
The paper bits are attracted to the comb and stick to it.
What happens when an object with a negative charge comes near another object with a negative charge?
The objects neither repel nor attract each other.
The objects both gain electric charges.
The two objects attract each other.
The objects repel each other.
Curtis uses a wool cloth to give a balloon a negative charge. What will happen if he holds the balloon near the wall, and why?
The balloon will not stick to the wall because the negatively charged balloon is repelled by the negatively charged wall.
The balloon will stick to the wall because a negatively charged object is attracted to the negatively charged wall.
The balloon will stick to the wall beacuse the negatively charged balloon is attracted to the uncharged wall. (It pushes the negatives away and is attracted to the positives)
What happens when the north and south poles of different magnets get close to each other?
nothing
They repel each other.
They attract each other.
What is the purpose of the battery in the circuit?
to slow the flow of electricity
to be a power source
to connect the components
to use electric current
Ryan has a circuit made up of a battery, a light bulb, some wires, and a metal rod as a switch. Ryan replaces the metal rod with a wooden rod. When he closes the new switch, what will Ryan most likely observe?
brighter bulb
unlit bulb
warmer bulb
flashing bulb
Which is NOT a way to increase an electromagnet's strength?
flip the battery so it is in the other direction
use a stronger battery
add more wire coils
In the diagram, the metal disk is most likely a what?
an electromagnet
a motor
an engine
a battery
The magnetic field is strongest...
at the south pole
at the north pole
in the center
at both of the poles
Erica looked at a group of objects and classified them as conductors or insulators. She made the table below to show her results.
What object is classified incorrectly?
wodden craft sticks
silver bracelet
plastic bottle
glass bead
Are the magnetic field lines in the picture correct?
Yes, because they point from north to south.
No, because they point from north to south (they're supposed to go the other way).
Yes, because the North pole is on the left in all pictures.
No, because the North pole is on the left in all pictures (it's supposed to be on the right).
Looking at the field lines in this picture, these two magnets are ________
Attracting
Repelling
Attracting and Repelling
Doing nothing
Select the diagram with the weakest magnetic field
Where is the magnetic field the strongest around a bar magnet?
far away from the magnet
at the side of the magnet
at the poles
above the magnet
Which of the following best describes a simple electric motor?
It converts electric energy into chemical energy and heat.
It converts mechanical energy into electric energy and heat.
It converts electric energy into mechanical energy and heat.
It converts mechanical energy into chemical energy and heat.
Generators & Electric Motors transform energy.
True
False
What device transforms mechanical energy into electrical energy?
Electric Motor
Generator
What device transforms electrical energy into mechanical energy?
Electric Motor
Generator
Provides power for homes
Generator
Electric Motor
What makes the blade in a fan move?
Generator
Electric Motor
The area of magnetic force around a magnet is known as its _____________.
magnetic field
magnetic declination
magnetic field lines
magnetic tangents
The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.
like
opposite
positive
negative
Are these magnets attracting or repelling?
attracting
repelling
The image above shows how iron filings respond to magnetic fields generated by two magnets with ____________ poles facing each other.
opposite
like
positive
negative
Which answer describes the pictures correctly?
Both drawings show attraction of magnetic forces.
The left drawing shows repulsion and the right drawing shows attraction of magnetic forces.
Both drawings show repulsion of magnetic forces.
The left drawing shows attraction and the right drawing shows repulsion of magnetic forces.
What will the magnets in the picture do?
Attract
Repel
Neither attract nor repel
Both attract and repel
What will the magnets in the picture do?
Attract each other
Repel each other
Both attract and repel
Neither attract nor repel
Eli is holding two magnets close to each other. What will happen when he lets go?
The magnets will not move because the magnets are not touching.
The magnets will move closer to each other because the magnetic force will pull the magnets together.
The magnets will move away from each other because the magnets are not touching.
The magnets will move away from each other because the magnetic force will push the magnets apart.
