Review Quiz Unit 2 Electromagnetism

Last updated 20 days ago

23 questions

1

Library

Review Quiz Unit 2 Electromagnetism

Last updated 20 days ago

23 questions

1

Draggable item		Corresponding Item

1

Draggable item		Corresponding Item

1

An electromagnet is created by looping a wire around an iron nail and connecting the ends of the wire to a battery. Which of the following will increase the strength of the electromagnet? Select all correct answers.

Add more loops in the wire

Use a higher voltage battery to increase the electric current in the wire

use a longer nail

disconnect the battery

If the North pole of a magnet is brought near the North pole of another magnet, which of the following will happen?

The magnets will repel each other

The magnets will attract each other.

Two magnets found with no label marking the North and South Poles. When the ends of the two magnets are brought near each other, they are attracted. What must be true about the ends of these two magnets?

Both of the ends were the South pole of each magnet

Both of the ends were the North pole of each magnet

One end was the South pole of the magnet, and the other end was the North pole of the magnet

1

If the distance between two magnets is increased (they are moved farther apart) what happens to strength of the magnetic force?

The magnetic force increases

The magnetic force decreases

The magnetic force will not change

Which of the following determines if a metal is magnetic?

The weight of the metal

The density of the metal

The alignment of the electrons (domains) in the atoms

The number of atoms in the metal

Three magnets, A, B, and C are the exact same size, but made of different materials. A scientist wants to determine which magnet is the strongest by seeing which magnet can pick up the most paperclips. She collects the data shown below. Based on this data, which magnet is the strongest?

Magnet A is strongest

Magnet B is strongest

Magnet C is strongest

The magnets are all the same strength

Which of the following will be attracted to a magnet?

wood

paper

cotton

a bike frame made of iron

What is the word used to describe a material that can be a permanent magnet?

What will happen if two oppositely charged particles are brought near each other?

They will attract each other

They will repel each other.

Match each subatomic particle to its charge

Draggable item		Corresponding Item
neutron		positive charge
electron		zero charge
proton		negative charge

Which of the following are true about atoms? Select all correct answers.

They are electrically neutral

They have the same number of protons and electrons

They have more protons than electrons

They have more electrons than protons

If an atom gains an electron what will be its charge?

positive

negative

neutral

If an atom loses an electron what will be its charge?

positive

negative

neutral

When a balloon is rubbed on your hair, electrons move from the hair to the balloon. Which of the following are true? Select all correct answers.

The balloon becomes positively charged

The balloon becomes negatively charged

The hair becomes positively charged

The hair becomes negatively charged

The hair will be attracted to the balloon

When a balloon is rubbed on your hair, electrons move from the hair to the balloon. You notice your hair stands straight up. Which of the following best explains this phenomenon?

The positive and negative charges of the hairs repel each other

The positive and negative charges of the hairs attract each other

The hair is all positively charged and these similar charges repel each other

Rubbing a balloon on hair causes the hair to no longer feel the gravity from the Earth

The hair is all positively charged and these similar charges attract each other

Match the following terms with their definitions

Draggable item		Corresponding Item
neutral		Electrical charge that is not moving
atom		Electrical charge that is moving
electric current		no charge
attract		smallest piece of a chemical element
repel		bring together
static electricity		push away

What are the units used to measure electric current?

1

A balloon that is hanging on a rope from the ceiling is rubbed on hair and it gains a negative charge. A second balloon is also rubbed on hair giving it negative charge. What will happen if the second balloon is brought near the hanging balloon?

The hanging balloon will be attracted to the second balloon and swing to the right

The hanging balloon will be repelled by the second balloon and swing to the right

The hanging balloon will be attracted to the second balloon and swing to the left

The hanging balloon will be repelled by the second balloon and swing to the left

A scientist is studying the question: How does electric current affect the strength of a magnetic field from an electromagnet? She uses different batteries that have different voltages which causes the current in the wire to change. She collects the data and creates the graph below. Which of the following is a reasonable claim from this data?

The strength of the magnetic field does not depend on the electric current in an electromagnet.

As the electric current in an electromagnet increases, the strength of the magnetic field decreases.

As the electric current in an electromagnet increases, the strength of the magnetic field increases.

An electromagnet is created by looping a wire around an iron nail and connecting the ends of the wire to a battery.  Which of the following will increase the strength of the electromagnet? Select all correct answers.

Add more loops in the wire

Use a higher voltage battery to increase the electric current in the wire

use a longer nail

disconnect the battery

If the North pole of a magnet is brought near the North pole of another magnet, which of the following will happen?

The magnets will repel each other

The magnets will attract each other.

Two magnets found with no label marking the North and South Poles.  When the ends of the two magnets are brought near each other, they are attracted.  What must be true about the ends of these two magnets?

Both of the ends were the South pole of each magnet

Both of the ends were the North pole of each magnet

One end was the South pole of the magnet, and the other end was the North pole of the magnet

The image is an example of which of the following?

permanent magnet

electromagnet

magnetic field

electric current

The image is an example of which of the following?

permanent magnet

electromagnet

magnetic field

Earth

The image is an example of which of the following?

permanent magnet

electromagnet

magnetic field

electric current

If the distance between two magnets is increased (they are moved farther apart) what happens to strength of the magnetic force?

The magnetic force increases

The magnetic force decreases

The magnetic force will not change

Which of the following determines if a metal is magnetic?

The weight of the metal

The density of the metal

The alignment of the electrons (domains) in the atoms

The number of atoms in the metal

Three magnets, A, B, and C are the exact same size, but made of different materials.  A scientist wants to determine which magnet is the strongest by seeing which magnet can pick up the most paperclips.  She collects the data shown below.  Based on this data, which magnet is the strongest?

Magnet A is strongest

Magnet B is strongest

Magnet C is strongest

The magnets are all the same strength

Which of the following will be attracted to a magnet?

wood

paper

cotton

a bike frame made of iron

What is the word used to describe a material that can be a permanent magnet?

permag

magper

ferromagnetic

ferma

magfer

What will happen if two oppositely charged particles are brought near each other?

They will attract each other

They will repel each other.

Match each subatomic particle to its charge

neutron

positive charge

electron

zero charge

proton

negative charge

Which of the following are true about atoms? Select all correct answers.

They are electrically neutral

They have the same number of protons and electrons

They have more protons than electrons

They have more electrons than protons

If an atom gains an electron what will be its charge?

positive

negative

neutral

If an atom loses an electron what will be its charge?

positive

negative

neutral

When a balloon is rubbed on your hair, electrons move from the hair to the balloon.  Which of the following are true?  Select all correct answers.

The balloon becomes positively charged

The balloon becomes negatively charged

The hair becomes positively charged

The hair becomes negatively charged

The hair will be attracted to the balloon

When a balloon is rubbed on your hair, electrons move from the hair to the balloon.  You notice your hair stands straight up.  Which of the following best explains this phenomenon?

The positive and negative charges of the hairs repel each other

The positive and negative charges of the hairs attract each other

The hair is all positively charged and these similar charges repel each other

Rubbing a balloon on hair causes the hair to no longer feel the gravity from the Earth

The hair is all positively charged and these similar charges attract each other

Match the following terms with their definitions

neutral

Electrical charge that is not moving

atom

Electrical charge that is moving

electric current

no charge

attract

smallest piece of a chemical element

repel

bring together

static electricity

push away

What are the units used to measure electric current?

Ampere

Volt

Joule

Newton

kilogram

This is a model of the an atom of Helium. Which particles are represented by the yellow circles on the outer ring?

protons

neutrons

electrons

Tritonons

A balloon that is hanging on a rope from the ceiling is rubbed on hair and it gains a negative charge.  A second balloon is also rubbed on hair giving it negative charge.  What will happen if the second balloon is brought near the hanging balloon?

The hanging balloon will be attracted to the second balloon and swing to the right

The hanging balloon will be repelled by the second balloon and swing to the right

The hanging balloon will be attracted to the second balloon and swing to the left

The hanging balloon will be repelled by the second balloon and swing to the left

A scientist is studying the question:  How does electric current affect the strength of a magnetic field from an electromagnet?  She uses different batteries that have different voltages which causes the current in the wire to change.  She collects the data and creates the graph below.  Which of the following is a reasonable claim from this data?

The strength of the magnetic field does not depend on the electric current in an electromagnet.

As the electric current in an electromagnet increases, the strength of the magnetic field decreases.

As the electric current in an electromagnet increases, the strength of the magnetic field increases.

The image is an example of which of the following?

permanent magnet

electromagnet

magnetic field

electric current

The image is an example of which of the following?

permanent magnet

electromagnet

magnetic field

Earth

The image is an example of which of the following?

permanent magnet

electromagnet

magnetic field

electric current

This is a model of the an atom of Helium.  Which particles are represented by the yellow circles on the outer ring?

protons

neutrons

electrons

Tritonons