Study Guide-Magnetic Fields

Name:

Multiple Choice
Identify the choice that best completes the statement or answers the question.

A Permanent Magnet (Diagram A)	Planet Earth (Diagram B)

Contrast the magnetic fields of the two objects shown above.
How are they different?

a.	Diagram A is a bar magnet with magnetic field lines, and diagram B is a horseshoe magnet with magnetic field lines.
b.	Diagram A is an electromagnet, but diagram B is showing electromagnetic induction.
c.	Diagram A shows both magnetic poles at the same end while diagram B shows magnetic poles at opposite ends like a bar magnet.

Planet Earth (Diagram A)	A Permanent Magnet (Diagram B)

Compare the magnetic fields shown in the two diagrams.
How are they similar?

a.	Each of these diagrams is demonstrating Earth’s aurora field that deflects solar wind.
b.	Diagram A is showing electromagnetism, but the other diagram is showing induction.
c.	Both objects have magnetic poles at each end with field lines originating from the north pole.

Picture A	Picture B

Examine the two pictures displayed above.
Describe the phenomena that is being demonstrated in these two pictures.

a.	This is showing magnetic field lines by using bar magnets and iron filings.
b.	This is demonstrating the fact that two bar magnets will always repel one another.
c.	This is showing electromagnetic induction that is creating an electrical current.

Invisible magnetic fields exist around permanent magnets, electromagnets, and our planet.
Which statement best compares the magnetic field of Earth to the magnetic field of a bar magnet?

a.	Magnetic field lines for both Earth and a bar magnet are generated from convection currents.
b.	Magnetic field lines around Earth are symmetrical but magnetic field lines around a bar magnet are not symmetrical.
c.	Magnetic field lines for both Earth and a bar magnet emerge from the north poles.

Diagram A (Two Bar Magnets-Attraction)	Diagram B (Two Bar Magnet-Repulsion)

Describe the phenomena that is illustrated in these two diagrams.

a.	In diagram A, two opposite poles are attracting. In diagram B, two like poles are repelling.
b.	Each diagram is showing magnets being used with solenoids to induce electrical current.
c.	Both diagrams are showing powerful electromagnets being used to lift objects.

Diagram A	Diagram B

Which type of magnet above best models Earth’s magnetic field and why?

a.	Diagram B. Earth has poles on the oppostite ends of the planet like a bar magnet.
b.	Diagram A. Earth has poles on the oppostite ends of the planet like a bar magnet.
c.	Diagram A. Earth has poles on the same side of the planet like a horseshoe magnet.

Two points are labeled on the iron core of the electromagnet shown below.

Which diagram below best represents the magnetic field lines that pass through Points 1 and 2?

Below is a diagram showing the Earth’s magnetic field.

eeee.

The north end of a magnet in a compass will point towards the geographic north of our planet. Yet one property of magnetic poles is that opposite’s attract.
Regarding our planet’s magnetic field, which choice below best demonstrates this property

a.	Earth’s north geographic pole is the planet’s north magnetic pole
b.	Earth’s north geographic pole is the planet’s south magnetic pole
c.	Earth’s south geographic pole is the same as the planet’s north geographic pole.

Study the illustration above showing Earth’s magnetic Field, and then answer this question.
Which of the following choices includes two effects of Earth’s magnetic field?

a.	compass points to geographic north (magnetic south) and auroras are seen at both poles
b.	compass points to magnetic north & auroras are seen at both poles
c.	compass points to geographic north (magnetic south) and auroras are seen only at the equator

10.

All magnets have invisible magnetic fields.
Which of the following diagrams shows a magnetic field most similar to the magnetic field of Earth?