Home
/
Physics
/
The pictures show the magnetic fields of a bar magnet and an electromagnet. What is the difference between the two magnetic fields? 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.

Question

The pictures show the magnetic fields of a bar magnet and an electromagnet.
What is the difference between the two magnetic fields?
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.

The pictures show the magnetic fields of a bar magnet and an electromagnet. What is the difference between the two magnetic fields? 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.

expert verifiedVerification of experts

Answer

4.0267 Voting
avatar
SiennaMaster · Tutor for 5 years

Answer

To answer the question, let's analyze the properties of the magnetic fields of a bar magnet and an electromagnet:Bar Magnet:- A bar magnet has a permanent magnetic field.- The magnetic field lines emerge from the north pole and enter the south pole.- The magnetic field is strongest at the poles and weaker in the middle.Electromagnet:- An electromagnet's magnetic field is created by an electric current passing through a coil of wire.- The strength of the magnetic field can be changed by adjusting the current or changing the number of coils.- The magnetic field is temporary; it exists only while current is flowing through the coil.- The magnetic field is usually strongest at the center of the coil, where the magnetic field lines are most concentrated.Now, let's evaluate the options given:A. The magnetic field of the bar magnet is temporary.- This statement is incorrect. The magnetic field of a bar magnet is permanent, not temporary.B. The magnetic field of the electromagnet is temporary.- This statement is correct. The magnetic field of an electromagnet exists only when electric current is flowing through the coil.C. The magnetic field of the bar magnet is weakest at the center.- This statement is incorrect. The magnetic field of a bar magnet is not weakest at the center; it is continuous from one pole to the other, and the field lines are closer together (stronger) at the poles.D. The magnetic field of the electromagnet is strongest at the poles.- This statement is generally incorrect. The strength of the magnetic field of an electromagnet is usually strongest at the center of the coil, where the field lines are most concentrated, not at the poles.Based on the analysis, the correct answer is:B. The magnetic field of the electromagnet is temporary.
Click to rate:

Hot Questions

More x