Question
• D = " X
The pictures show the magnetic fields of a bar magnet and an electromagnet.
Bar magnet
What is the difference between the two magnetic fields?
Electromagnet
• A. The magnetic field of the bar magnet is temporary.
• B. The magnetic field of the electromagnet is temporary.
• C. The magnetic field of the bar magnet is weakest at the center,
• D. The magnetic field of the electromagnet is strongest at the poles.
CRESET
Khalfan Abdulla Khalfan Bin Falah Al Ali, Growth: Science 3-5: for use with NGSS Question #
[D#****01
Intl 2013
38
Answer
The difference between the two magnetic fields is that the magnetic field of the bar magnet is permanent, while the magnetic field of the electromagnet is temporary. Additionally, the magnetic field of the bar magnet is strongest at the poles, while the magnetic field of the electromagnet is strongest at the center.