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WorksheetsYr8 revision
Total questions: 55
Worksheet time: 35mins
The area of magnetic force around a magnet is known as its _____________.
magnetic field
magnetic declination
magnetic fan lines
magnetic tan lines
A ________ is a device that has a magnet on a needle that spins freely. It is used for navigation because its needle usually points north.
calculator
ruler
compass
map
Dylan puts two magnetic toy trains very close to each other on a track. What will happen next, and why?
The trains will not move because the magnets are not touching.
The trains will move closer to each other because the magnetic force will pull the trains together.
The trains will move away from each other because the magnetic force will push the trains apart.
The trains will move away from each other because the magnets are not touching.
True or False: A magnet is attracting when it pushes objects away from each other.
True
False
If the proton is released at the equator and falls toward the earth under the influences of the gravity, the magnetic force on the proton will be toward the
north
south
east
west
This is a very simple component, that includes a coil of wire that is covered around a core made out of a metal. When a current is applied to it, it has the effect of assembling a consistent magnetic field.
(a)
An electromagnet is
an object that exerts magnetic force
an object that exerts electric force
an object that exerts electric force using magnetism
an object that exerts magnetic force using electricity
A solenoid is
a coil of wire that acts like a magnet when electricity passes through it.
a straight wire that acts like a magnet when electricity passes through it
a coil of wire that acts like a battery when electricity passes through it.
a straight wire that acts like a battery when electricity passes through it
In order to create this electromagnetic with a solenoid, which direction would current be flowing on the side closest to us?
up
down
left
right
If the current in a solenoid is decreased,
the induced magnetic field is weaker and its direction is reversed
the induced magnetic field is weaker and its direction stays the same
the induced magnetic field is stronger and its direction is reversed
the induced magnetic field is stronger and its direction stays the same
Which is true?
Paramagnetic materials increase the magnetic field strength by a lot when placed in a solenoid
Paramagnetic materials increase the magnetic field strength by a bit when placed in a solenoid
Paramagnetic materials decrease the magnetic field strength by a lot when placed in a solenoid
Paramagnetic materials decrease the magnetic field strength by a bit when placed in a solenoid
Which is true?
Diamagnetic materials increase the magnetic field strength by a lot when placed in a solenoid.
Diamagnetic materials increase the magnetic field strength by a bit when placed in a solenoid.
Diamagnetic materials decrease the magnetic field strength by a lot when placed in a solenoid.
Diamagnetic materials decrease the magnetic field strength by a bit when placed in a solenoid.
Select all that apply. Which of these are applications of electromagnets?
lifting electromagnets
bar magnets
fridge magnets
relays
electric bells
A magnet can attract any material contains...................
wood
plastic
iron
non-magnetic material is such as................
paper clips
glass cups
scissors
North pole of magnet points to...................direction
south
north
east
west
south pole of magnets points to...............direction.
south
north
west
magnetic materials are such as...............,.................
wood and plastic
iron nails and paper clips
plastic cup
when 2 magnets are put close to each other from the same poles they .................each other
attract
repel
when 2 magnet are put from different poles they.................each other.
attract
repel
What happens when two north poles of a magnet are placed together?
¿Qué sucede cuando dos polos norte de un imán se colocan juntos?
they repel (push away)
se repelen (se alejan)
they attract (pull together)
se atraen
they cancel each other out
se cancelan mutuamente
the strength of the magnet is doubled
la fuerza del imán se duplica
Magnetism is generated by moving __________.
El magnetismo se genera al mover _____________.
protons.
electrons.
neutrons.
elements.
What do the lines around this magnet represent?
¿Qué representan las líneas alrededor de este imán?
North Pole
South Pole
Magnetic Declination
Magnetic Field
Why is a compass needle attracted to the North?
There wind in the north
Because it is being attracted to the Magnetic South Pole
Because there iron in the north
It repeals from the north pole
Menu
Earth is like a giant magnet due to....
its liquid iron core
the wind patterns of Coriolis Effect
the alignment of the continents
solar particles moving through the atmosphere
Why is a compass needle attracted to the North?
There wind in the north
Because it is being attracted to the Magnetic South Pole
Because there iron in the north
It repeals from the north pole
Menu
Earth is like a giant magnet due to....
its liquid iron core
the wind patterns of Coriolis Effect
the alignment of the continents
solar particles moving through the atmosphere
Many animals use Earth's magnetic field to guide them where to to travel and migrate.
true
false
only humans use it to travel
scientists cannot determine this
The area around the planet Earth where the magnetic field is in is called ___________________
ionosphere
magnetosphere
stratosphere
solarsphere
What’s the most important function of Earth’s magnetic field?
Earth's magnetic shield deflects asteroids and meteors
Earth's magnetic shield keeps energy from escaping into space
Earth's magnetic shield deflects most of the solar wind
Earth's magnetic shield helps birds and other animals navigate
Where is Earth's magnetic field strongest?
Along the outside lines
Along the inside lines on either side
Where the lines are close together at the poles
In the space outside of the lines
Magnetic Field lines....
Go into the N side AND go into the S side
Go out of the S side and into the N side
Go out of the N side AND out of the S side
Go out of the N side and into the S side
It is a kind of magnet that works only when there is a flow of electricity.
Electromagnet
Bar Magnet
Horse Shoe Magnet
Magnetite
Electromagnets are ___________________.
permanent
instant
temporary
stable
Sophia made an electromagnet but it was very weak. How can she make it stronger?
take away the battery
wrap the wire loosely
use less copper wire
coiled more copper wire
What component becomes a temporary magnet when electricity is flowing through the circuit?
iron nail
copper wire
battery
switch
What component provides the pathway to carry electricity from component to component?
battery
wire
switch
iron nail
Which component provides the energy or the power source to run the electromagnet?
Iron nail
wire
Switch
Battery
What is an electromagnet?
a permanent magnet with a north and south pole
a temporary magnet made from current carrying wire around a magnetic metal core
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
Remove all the coils and the nail.
Use a smaller battery.
Reverse the poles of the magnet.
Add more coils of wire to the nail.
