1. For a bar magnet, the magnetic field lines point

a. towards the South pole.
b. towards the North pole.
c. always towards the magnet.
d. always away from the magnet.

my answer: a

2. Magnetic field lines
a. are straight lines.
b. are always circles.
c. form continuous loops.
d. None of these choices is correct.

my answer: c

3. Magnetic fields are strongest
a. near the poles of a permanent magnet.
b. near concentrations of positive charges.
c. near copper bars that have received a static negative charge.
d. near the equator.

my answer:a

4. The Earth's geographic North pole
a. is where the North end of a magnet is attracted.
b. is where the South end of a magnet is attracted.
c. is where the North end of a magnet is repelled.
d. All of these choices are correct.

my answer: b

Your answers are correct!

1. a
2. c
3. a
4. b

1. To determine the direction of the magnetic field lines for a bar magnet, you can use the right-hand rule. Imagine holding the bar magnet in your right hand, with your thumb pointing towards the North pole. The direction in which your fingers curl around the magnet represents the direction of the magnetic field lines. Therefore, the correct answer is b. towards the North pole.

2. Magnetic field lines are not always straight lines. They can be curved or take various shapes depending on the configuration of the magnetic field source. However, they always form continuous loops. Therefore, the correct answer is c. form continuous loops.

3. The strength of a magnetic field is indeed strongest near the poles of a permanent magnet. The magnetic field lines are most concentrated and closer together in this region, indicating a stronger field. Therefore, the correct answer is a. near the poles of a permanent magnet.

4. The Earth's geographic North pole is not where the South end of a magnet is attracted, as magnetism and geographical orientation are unrelated. Instead, it is where the North end of a magnet is attracted, indicating that the Earth's geographic North pole is like a magnetic South pole. Therefore, the correct answer is a. is where the North end of a magnet is attracted.

1. The correct answer is b. The magnetic field lines of a bar magnet point towards the North pole.

2. The correct answer is c. Magnetic field lines form continuous loops, indicating the direction of the magnetic field around a magnet.

3. The correct answer is a. Magnetic fields are strongest near the poles of a permanent magnet, where the field lines are most concentrated.

4. The correct answer is b. The Earth's geographic North pole is where the South end of a magnet is attracted. The Earth acts like a giant bar magnet with its magnetic field aligned in the opposite direction to its geographic North pole.