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WorksheetsMagnetism (9-O)
Total questions: 50
Worksheet time: 1hrs 6mins
Name
Class
Date
1.
Earth acts like a giant magnet because its center is made up MOSTLY of
a)
granite
b)
limestone
c)
iron
d)
nickel
2.
Where is the strongest attraction force of the magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
3.
Magnetism is generated by moving
a)
protons.
b)
electrons.
c)
neutrons.
d)
elements.
4.
As the distance between two magnets increases (they get farther apart), the force between them:
a)
Increases
b)
Decreases
c)
Stays the Same
5.
If you cut a magnet in half, what happens to the poles?
a)
One half gets the North Pole, the other half gets the South Pole
b)
Both halves get only a North Pole
c)
Both halves get only a South Pole
d)
Both halves get a North pole and a South Pole
6.
What characteristics do magnetic substances have?
a)
They can give you a "shock" when you touch them
b)
They can push or pull objects without touching them
c)
They are always black and cold to touch
d)
They fall faster than other objects when you drop them
7.
What kind of magnet can be turned on and off?
a)
refridgerator magnet
b)
electromagnet
c)
magnetite
d)
iron
8.
The two poles on a magnet are
a)
north and east
b)
north and west
c)
south and north
d)
south and west
9.
Electricity can be used to create a magnet
a)
True
b)
False
10.
You can make an electromagnet stronger by...
a)
increasing the current through the wire
b)
make the iron core bigger
c)
increase the number of loops around the core
d)
All of these
11.
Todos los cuerpos tienen cargas eléctricas.
a)
Verdadero
b)
Falso
12.
Un cuerpo puede adquirir…
a)
Carga positiva o carga negativa
b)
Solo carga positiva
c)
Solo carga negativa
d)
Carga positiva, carga negativa y neutra
13.
Si un cuerpo tiene las mismas cargas negativas y positivas, decimos que es eléctricamente…
a)
Neutro
b)
Positivo
c)
Negativo
d)
Alcalino
14.
Dos cuerpos cargados con el mismo tipo de carga…
a)
Se repelen.
b)
Se atraen.
c)
No pasa nada.
15.
Un imán puede atraer a todos los objetos.
a)
Verdadero
b)
Falso
16.
Un ejemplo de imán natural es…
a)
La magnetita
b)
Los imanes de la nevera de casa.
c)
Un electroimán
d)
Una lata de refrescos.
17.
La zona de atracción de un imán se denomina…
a)
Campo magnético.
b)
Polo magnético.
c)
Brújula
d)
Imantación
18.
Si partimos un imán por la mitad…
a)
Creamos dos imanes con dos polos magnéticos cada uno.
b)
Creamos dos imanes de un polo magnético cada uno.
c)
Creamos dos trozos de material que no son imanes.
d)
Creamos un imán y un trozo de material inservible.
19.
Nuestro planeta actúa como un imán gigantesco.
a)
Verdadero
b)
Falso
20.
El polo norte geográfico coincide con el polo norte magnético.
a)
Verdadero
b)
Falso
21.
Utilizamos la brújula para poder orientarnos con el magnetismo terrestre.
a)
Verdadero
b)
Falso
22.
Si enfrentamos dos imanes por los polos iguales…
a)
Se repelerán.
Se repelerán.
b)
Se atraerán.
c)
S quedarán pegados.
d)
No pasará nada.
23.
Los polos opuestos de un iman se ......
a)
Se pegan
b)
Se repelen
c)
No se juntan
d)
Se atraen
24.
Un objeto de metal que actúa como un imán cuando tiene una corriente eléctrica
a)
un electroimán
b)
el espectro electromagnético
c)
Un generador
25.
Un objeto con un polo norte y sur que produce un campo magnético.
a)
la energia
b)
Un imán
c)
El electón
26.
La capacidad de un material para atraer otros materiales.
a)
polos
b)
imanes
c)
magnetismo
d)
campo magnético
27.
¿Cómo se le llama a los cuerpos magnéticos que atraen objetos como el acero?
a)
polos
b)
imanes
c)
magnetismo
d)
campo magnético
28.
El espacio sobre el cual un imán ejerce una fuerza magnética.
a)
polos
b)
imanes
c)
magnetismo
d)
campo magnético
29.
What will happen when these magnets are brought close together?
a)
They will attract each other.
b)
They will repel each other.
c)
Both magnets will turn to the left
d)
Both magnets will turn to the right
30.
Iron, Nickel and cobalt are all __________________ materials
a)
Shiny
b)
poles
c)
magnetic
d)
cold
31.
True or False: All metals are attracted to magnet.
a)
True
b)
False
32.
A device that uses a free-moving magnetic needle to show direction is a:
a)
Ruler
b)
magnet
c)
compass
d)
magnetic field
33.
How is a permanent magnet DIFFERENT from a temporary magnet?
a)
A permanent magnet attracts materials made of iron.
b)
A permanent magnet has poles.
c)
A permanent magnet has a magnetic field.
d)
A permanent magnet keeps its magnetism for a long time.
34.
Where is the force of attraction the strongest on a magnet?
a)
at the poles
b)
in the middle
c)
above the magnet
d)
below the magnet
35.
Why does a compass needle point north?
a)
The compass is a bar magnet
b)
Because north is up
c)
Because it's magic
d)
It lines up with the Earth's magnetic field
36.
The magnet's shown will
a)
not move
b)
attract
c)
repel
d)
all of the above
37.
What do the lines around this magnet represent?
a)
North Pole
b)
South Pole
c)
Magnetic Declination
d)
Magnetic Field
38.
What is responsible for the Magnetic Field around Earth?
a)
The Earth's crust
b)
The Earth's molton iron core
c)
The Earth's mantel
d)
The Sun
39.
A refrigerator magnet is an example of a:
a)
magnetic material
b)
permanent magnet
c)
horseshoe magnet
d)
temporary magnet
40.
Look at the electric circuit above:
a)
The circuit is closed.
b)
It doesn't include a load.
c)
The circuit is open.
d)
It does not include an electrical source.
41.
What is electric current?
a)
A flow of electric charges.
b)
static electricity.
c)
two objects repelling from each other.
d)
batteries.
42.
This is a picture of a simple electromagnet. How can the electromagnet be made stronger?
a)
Add more coils of wire to the nail.
b)
Use a smaller battery.
c)
Reverse the poles of the magnet.
d)
Remove all the coils and the nail.
43.
What is the device seen here?
a)
generator
b)
electric motor
c)
electromagnet
d)
magnet
44.
Rubbing a balloon on a wool jumper can cause a build up of static electricity, this occurs because...
a)
protons prefer to be present on the balloon surface
b)
electricity is moving from one charged surface to another
c)
wool jumpers are good conductors of electricity
d)
friction between the two surfaces causes electrons to build up on one side
45.
If a magnet is pushed into a coil, voltage is induced across the coil. If the same magnet is pushed
into a coil with twice the number of loops,
into a coil with twice the number of loops,
a)
a. one-half as much voltage is induced.
b)
b. the same voltage is induced.
c)
c. twice as much voltage is induced.
d)
d. four times as much voltage is induced.
46.
In an electric motor, the coil of the electromagnet is connected to a ________ or other source of electric current.
a)
battery
b)
engine
c)
wire
d)
magnet
47.
The picture below shows a device made of a battery, a nail, and a long piece of copper wire. It converts electrical energy into a different form of energy. Which term describes the device in the illustration?
a)
electric switch
b)
electromagnet
c)
electric motor
d)
electric generator
48.
What type of force is holding this balloon to the wall?
a)
Applied
b)
Gravitational
c)
Magnetic
d)
Electrical
49.
What type of force causes these balloons to move toward or away from each other?
a)
Gravitational
b)
Applied
c)
Magnetic
d)
Electrical
50.
A simple electromagnet can be made with which of the following?
a)
an electric current
b)
a turbine and nail
c)
a nail, a wire, and a battery
d)
a compass and a battery
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