What does not affect the strength of an electromagnet

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Which of these materials lists could be combined to make an electromagnet?

Possible Answers:

a battery, a lightbulb, and an ice block

a copper wire, a nail, and a battery

a piece of paper, a copper wire, and a hammer

a copper wire, a potato, and a hammer

Correct answer:

a copper wire, a nail, and a battery

Explanation:

The answer is "a copper wire, a nail, and a battery." The battery provides electricity which travels through the copper wire, and changes the alignment of the electrons in the iron nail, making it magnetic.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

Permanent magnets are also called:

Possible Answers:

electromagnets

perma-magnets

conductors

ferromagnets

Correct answer:

ferromagnets

Explanation:

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

As the distance between two objects increases, the magnetic attraction:

Possible Answers:

stays the same

decreases

increases

Explanation:

The answer is decreases. Magnetism is more powerful when objects are closer together. 

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

Which of the following metals would be attracted to a magnet?

Possible Answers:

cobalt

iron

nickel

all of these

Correct answer:

all of these

Explanation:

The answer is all of these. Iron, nickel, and cobalt are the three types of magnetic metals.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

Which of these does NOT affect the strength of a magnet as it pulls on an object?

Possible Answers:

the kind of object

the size of the object

all of these affect the strength of a magnet

the temperature of the object

how close the object is to the magnet

Correct answer:

all of these affect the strength of a magnet

Explanation:

The answer is "all of these affect the strength of a magnet" The proximity to the object, the size of the object, the material of the object it is sticking to, and the temperature of the object all affect magnetic pull.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

What do the dotted lines around this bar magnet represent?

Possible Answers:

the magnetic field

the force of gravity

none of these

the movement of electricity

Correct answer:

the magnetic field

Explanation:

The answer is "the magnetic field." The magnetic field shows us the influence of electrical charges around magnets.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

The image shows an electric generator. Based on this image, what can you say is probably true about this electric generator?

Possible Answers:

the core is filled with water

the core uses nuclear energy

the core is made of rubber

the core is made of iron

Correct answer:

the core is made of iron

Explanation:

The answer is "the core is made of iron" because the image shows an electromagnet. Electromagnets need an iron core, magnets, and a copper wire to function.

The image shows a copper wire looped around an electromagnet. Which of these electromagnets will be stronger?

Possible Answers:

it depends on other factors

the one with fewer loops

the one with many loops

the number of loops doesn't matter

Correct answer:

the one with many loops

Explanation:

The answer is, the one with more loops. Having more loops around the core will increase a magnet's strength.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

What do electric and magnetic forces have in common?

Possible Answers:

They are stronger when two objects are closer

Neither of these

Both of these

They depend on the movement of electrons

Correct answer:

Both of these

Explanation:

The answer is both of these.

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

If you try to put two north poles of a magnet together, what happens?

Possible Answers:

they explode

they attract

they repel

a chemical reaction occurs

Correct answer:

they repel

Explanation:

The answer is "They repel."

Magnetism is the force by which objects are attracted to or repelled by other objects. Magnets have two opposite ends, called poles. The north pole of one magnet will repel, or push away, the north pole of another magnet. The same thing will happen with two south poles. North and south poles of magnets are attracted to each other.

Magnetism involves electrons and electricity. Most iron is not permanently magnetic, but it can be made into a temporary magnet. The reason this is possible has to do with the electrons that make up the iron atoms. When the electrons are lined up just right, the piece of iron becomes a temporary magnet.

We call permanent iron magnets “Ferromagnetic,” but electricity is often used to make a type of magnet, called an electromagnet. Electromagnets are made from copper wire coiled around a core. Iron placed inside the core makes the magnet stronger. When an electric current is sent through the coiled wire, the wire becomes magnetized. When the current stops, the magnetism stops too.

All Middle School Physical Science Resources

What affect the strength of an electromagnet?

Which one of the following does not affect the strength of an electromagnet?

Which of the following does not affect the strength of a magnetic field?

Which does not affect the magnetism?