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WorksheetsPS.9 Electricity & Magnetism Study Guide
Total questions: 61
Worksheet time: 31mins
Objects can be charged in many ways. In the image below, a student is rubbing a balloon on her head.
What method is this student using to charge the balloon?
friction
repulsion
induction
conduction
Observe the photo of an electromagnet.
Electric current flows through the wire. What is the name for this coiled wire that is wrapped around the iron core of the electromagnet?
generator
solenoid
transformer
trapezoid
How do an electric motor and electric generator differ?
one uses a permanent magnet, while the other uses temporary magnets
one produces electrical energy, while the other produces thermal energy
one contains moving parts, while the other has only parts that do not move
one uses an electric current to produce motion, while the other uses motion to produce an electric current
What type of material does NOT allow electrons to flow easily?
insulator
conductor
series
circuit
The build up of charges on an object is called...
electromagnetism
magnetic fields
static electricity
stationary charges
In order to turn on the light, a piece of wire needs to be connected from...
a to c
b to c
c to d
a to d
An example of a semiconductor is...
plastic
salt water
dry air
silicon
A mixture of iron filings and sulfur can easily be separated by
placing the mixture in water
performing a chemical reaction
using a magnet
heating the mixture
What type of circuits should a new house you are building use?
series
parallel
Laundry in a dryer often become charge with static electricity while drying. Which best explains why?
electrons are transferred as clothes rub against each other
clothes with metal pieces conduct electricity in the dryer
heat from the dryer charges the air and produces lightning
short circuits in the dryer charge the laundry
An iron nail wrapped with copper wire and attached to a battery makes...
compass
metal magnet
permanent magnet
electromagnet
What would happen to the lights in this circuit if another light was added?
they would all remain lit, but would be dimmer
they would all go out
they would all remain light and brightness stays the same
they would all remain lit, but would be brighter
A device that converts electrical energy into mechanical energy is called an
electromagnet
electric current
electric generator
electric motor
A device converts mechanical energy into electrical energy
electromagnet
electric current
electric generator
electric motor
What is one advantage of using electromagnets instead of permanent magnets?
electromagnets are small
electromagnets do not have poles
permanent magnets last longer
electromagnets can be turned on and off
Good insulator
paper
aluminum
rubber
plastic
gold
What kind of circuit is this?
series
parallel
Opposite electric charges do this
repel
attract
nothing
Like electric charges do this
repel
attract
nothing
A complete, unbroken path through which electric charges can flow is a (an) ______
electric circuit
electrical resistance
magnetic field line
magnetic pole
Materials that allow the charges of an electric current to move freely through them are called ___________.
insulators
conductors
resistors
magnets
The type of current produced by a battery is ___________
direct current
alternating current
magnetic current
induced curreny
A device that increases or decreases voltage is called a (an) _________
alternator
transformer
generator
turbine
An alternating current consists of charges that __________
turn on and off repeatedly
move back and forth in a circuit
flow in one direction only
flow in one direction in some devices and change direction in others
An electric current produces a (an) _________
magnetic field
magnet
solenoid
insulator
a closed path through which electric current flows is a
wire
circuit
bulb
battery
Steady flow of electrons through a conductor is
resistance
current
electric force
an insulator
If the light bulb in the middle burned out, what would happen to the other two?
The light bulb to the left would stay lit, but the one to the right would turn off.
They would both stay lit.
The light bulb to the right would stay lit, but the one to the left would turn off.
They would both turn off.
What are the two types of electricity?
Static and electrons
Current and voltage
Series and parallel
Static and current
In a circuit diagram, this symbol represents a
switch
multimeter
battery
globe
What type of circuit is this?
Series
Parallel
Simple
In a series circuit, how is the brightness of a light globe affected when another globe is connected?
It gets brighter
It stays the same
It gets dimmer
It goes out
Electric current flows from
detect electric current
negative terminal to positive terminal
positive terminal to negative terminal
the flow rate of electric charges through a conductor
Electrons flows from
detect electric current
negative terminal to positive terminal
positive terminal to negative terminal
the flow rate of electric charges through a conductor
What will happen to the 2 magnets if they are released?
attract
repel
In the bottom of the picture, what explains why the balloons are repelling each other?
opposites attract
like charges in the balloon are repelling each other
the helium has negative charges
Which of the following best describes what is being created in the picture?
static electricity
potential energy
magnetic field
Which electromagnet can lift more paperclips?
example W
example x
Copper wire, an iron nail, and a battery can be used to make an
(a)
The flow of electric charges is
voltage
current
resistance
electricity
The tendency for a material to oppose the flow of electrons is _____.
current
resistance
conductor
voltage
Is the symbol for _____.
Light bulb
Resistor
Battery
Switch
Electricity that flows in only one direction is called _____.
Alternating current (AC)
Direct current (DC)
Electricity that changes direction as it flows is called _____.
Alternating current (AC)
Direct current (DC)
What is the name of this device?
electric circuit
generator
electromagnet
electric motor
What is the name of this device?
electric circuit
electric motor
electromagnet
generator
What happens in an electromagnet?
Mechanical energy produces an electric field
Mechanical energy transforms into electrical energy
Electrical energy produces a magnetic field
Electrical energy transforms into mechanical energy
When electricity to an electromagnet is stopped, what happens to the strength of the magnet?
The magnetism stays the same
The magnetism decreases
The magnetism increases
The magnetism stops
Which energy transformation is found in generator?
Chemical energy to Electrical energy
Chemical energy to Mechanical energy
Electrical energy to Mechanical energy
Mechanical energy to Electrical energy
What type of machine converts electrical energy to mechanical energy using magnetism?
Turbine
Motor
Generator
Electromagnet
What is created by the flow of electric current?
A magnetic field
A transformer
An electric field
A battery
What is the role of the generator in this system?
It supplies the original energy source for the system.
It converts the magnetism in the turbine into mechanical energy.
It produces the electrical current using the mechanical energy of the turbine.
It transmits the higher-voltage current throughout the power grid system.
How would you describe this circuit?
Open
Closed
Efficient
Parallel
If a bulb is added between the battery and the switch, ____
The bulbs get brighter
The bulbs get dimmer
The bulb brightness stays the same
All the bulbs go out
If you add another bulb in parallel,_____
The bulbs get brighter
The bulbs get dimmer
The bulb brightness stays the same
All the bulbs will go out
If the top bulb goes out,
All the bulbs go out
The other bulbs get dimmer
There is no effect on the other bulbs
The other bulbs get brighter
A generator is used to produce
Direct current
Alternating current
Static electricity
Magnetism
