Oersted demonstrated which of the following? Choose all that are true.

Magnetic fields are created when electric current passes through a wire.

Magnetic field lines point perpendicular to the wire.

Reversing the direction of electric current reverses the direction of the magnetic field lines.

Which of the following are true about a solenoid and an electromagnet? Choose all that are true.

They are both are both designs that use electric current to create a magnetic field.

The strength of the magnetic field made by these designs can be changed by adjusting current, the number of coils, and how far apart coils are.

Electromagnets can also be strengthened by using a more magnetic material in the core.

What is the primary function of a galvanometer?

To measure the strength and direction of electric current

How does the wire in a galvanometer rotate?

By interacting with the permanent magnetic field

What happens when greater amounts of current pass through the galvanometer?

The needle moves farther along the display

The electromagnet stops working

The permanent magnet loses its magnetic field

What creates the electromagnet in a galvanometer?

Current passing through the yellow wire

Which components interact in a galvanometer to measure current?

An electromagnet and a permanent magnet

What does a galvanometer measure?

the strength of electric current

the direction of electric current

What is the primary function of an electric motor?

To convert electrical energy into mechanical energy

To convert mechanical energy into electrical energy

How does the armature in an electric motor continue spinning in the same direction?

By reversing the current through the armature when brushes hit a gap in the commutator

By maintaining a constant current through the armature

By using a permanent magnet to stabilize the rotation

By increasing the voltage supplied to the commutator

What is the role of the brushes in an electric motor?

To transfer current to the commutator

To reverse the direction of the current

Compared to a galvanometer, what major design differences of an electric motor allow it to create mechanical energy?

using a commutator to alternate the direction of current

using brushes to deliver electric current

using a permanent magnet and an electromagnet in one device

Which of the following statements are true?

Electromagnets are often used in conjunction with permanent magnets to create useful mechanisms.

A galvanometer measures the strength and direction of electric current by placing an electromagnet between two poles of a permanent magnet.

An electric motor changes electrical energy into mechanical energy.

Electric motors differ from galvanometers by using brushes to deliver electrical current and a commutator to reverse the direction of current.

Electromagnetism (part 2)

Electromagnetism (Part 2)

Authored by CAIS Science

Science

6th - 8th Grade

NGSS covered

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25 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following electromagnets will be stronger?

Electromagnet one will have a stronger magnetic field.

Electromagnet two will have a stronger magnetic field.

Both electromagnets will have a magnetic field of the same strength.

It is not possible to determine which electromagnet is stronger from the information given.

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Action: Making coils farther apart

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Action: Adding an iron core to a solenoid

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Action: Decreasing the current

Tags

NGSS.MS-PS2-3

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Action: Removing 2 coils

MULTIPLE SELECT QUESTION

45 sec • 1 pt

Which of the following can be done to increase the strength of a magnetic field in an electromagnet?

increase current

increase the number of coils

decrease the distance between coils

add a more ferromagnetic core

Use copper wire coated in a thick insulating material

Tags

NGSS.MS-PS2-3

DRAG AND DROP QUESTION

1 min • 1 pt

(a) is the ability of magnetism and electricity to affect one another.

Electromagnetism

Gravitational Force

Nuclear Fusion

Thermodynamics

Tags

NGSS.MS-PS2-3

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Electromagnetism (Part 2)

Which of the following electromagnets will be stronger?

Action: Making coils farther apart

Action: Adding an iron core to a solenoid

Action: Decreasing the current

Action: Removing 2 coils

Which of the following can be done to increase the strength of a magnetic field in an electromagnet?

​ (a) is the ability of magnetism and electricity to affect one another.

Oersted demonstrated which of the following? Choose all that are true.

A ​ (a) and an electromagnet are both designs that use electric current to create a magnetic ​ (b) .

Which of the following are true about a solenoid and an electromagnet?Choose all that are true.

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(a) is the ability of magnetism and electricity to affect one another.

A (a) and an electromagnet are both designs that use electric current to create a magnetic (b) .

Which of the following are true about a solenoid and an electromagnet?
Choose all that are true.