5. A magnetic field map shows
a. the direction of the magnetic field.
b. a few representational field lines.
c. relative strength of the magnetic field.
d. All of these choices are correct.
my answer: d
6. Magnetic field lines
a. can cross each other when the field is strong.
b. are visible lines seen around magnets.
c. can easily be drawn within the subatomic structure of a magnetic atom.
d. indicate which way a compass needle would point if placed near the magnet.
my answer: d
7. What happens to the direction of the magnetic field lines when the magnet responsible
for them is reversed?
a. The direction of the magnetic field lines is reversed.
b. The direction of the magnetic field lines stays the same.
c. The field density increases.
d. None of these choices is correct.
my answer: b
8. According to the law of magnetic poles
a. a magnetic South pole would attract a magnetic North pole.
b. a magnetic North pole would repel a magnetic South pole.
c. a magnetic South pole would attract a magnetic South pole.
d. magnetic poles in a bar magnet cancel each other out.
my answer: a
To answer question 5, a magnetic field map shows the direction of the magnetic field, a few representational field lines, and the relative strength of the magnetic field. So, the correct answer is d.
For question 6, magnetic field lines indicate the direction in which a compass needle would point if placed near the magnet. So, the correct answer is d.
When the magnet responsible for the magnetic field lines is reversed, the direction of the magnetic field lines also reverses. Therefore, the correct answer to question 7 is a.
According to the law of magnetic poles, a magnetic South pole would attract a magnetic North pole. Thus, the correct answer to question 8 is a.
Your answers are correct:
5. The correct answer is: d) All of these choices are correct. A magnetic field map shows the direction of the magnetic field, a few representational field lines, and the relative strength of the magnetic field.
6. The correct answer is: d) Magnetic field lines indicate which way a compass needle would point if placed near the magnet. Magnetic field lines are not actually visible lines seen around magnets.
7. The correct answer is: b) The direction of the magnetic field lines stays the same. When the magnet responsible for the field lines is reversed, the direction of the field lines does not change. They still follow the same pattern as before.
8. The correct answer is: a) A magnetic South pole would attract a magnetic North pole. According to the law of magnetic poles, opposite magnetic poles attract each other while similar magnetic poles repel each other.