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P7: Quiz 1 – Answers
P7: Quiz 1 – Answers
1)
a) A magnetic field is a region where another magnet or a magnetic material will experience a (non-contact) force
b) Non-contact force
c)
i) Positive
ii) Negative
d) Positive to negative
e) Stronger
2) The compass will point to the North because of the magnetic field produced by earth
3)
a)
a) A magnetic field is a region where another magnet or a magnetic material will experience a (non-contact) force
b) Non-contact force
c)
i) Positive
ii) Negative
d) Positive to negative
e) Stronger
2) The compass will point to the North because of the magnetic field produced by earth
3)
a)
b) We place the magnet onto a piece of paper and draw around where the magnet is. We then place the compass near the magnet. The needle of the compass will line up with the magnetic field produced by the magnet. We then mark on the paper the direction of the needle. We then move the compass along the magnetic field line and tracing the field lines around the magnet. We keep moving the compass and join up all of the points where the compass was. After we have completed one line going from the north pole of the magnet to the south pole of the magnet, we place the compass in a new location and repeat the process again
c) Iron filing will not show us the direction of the field lines. Whereas, a compass will show us the direction of the field lines
4) We show a uniform magnetic field by drawing at least 3 fields lines are straight, parallel and the same distances apart from each other.
5)
a) Make sure that there are at least 3 straight lines to show a uniform magnetic field
c) Iron filing will not show us the direction of the field lines. Whereas, a compass will show us the direction of the field lines
4) We show a uniform magnetic field by drawing at least 3 fields lines are straight, parallel and the same distances apart from each other.
5)
a) Make sure that there are at least 3 straight lines to show a uniform magnetic field
b) Attraction
6)
a)
6)
a)
b) Repulsed
7)
a)
7)
a)
b) Repulsed
Questions
1)
a) What is a magnetic field?
b) Is a magnetic force an example of a contact or non-contact force?
c)
i) Is the north pole of a magnet positively or negatively charged?
ii) Is the south pole of a magnet positively or negatively charged?
d) Do the magnetic field lines go from positive to negative, or from negative to positive?
e) If the field lines for a magnet are closer together, does this mean that the magnetic field is stronger or weaker?
2) Where will a compass point if it is not in the magnetic field of a magnet? Why is this the case?
3) The diagram below shows a bar magnet with the north and south pole labelled.
1)
a) What is a magnetic field?
b) Is a magnetic force an example of a contact or non-contact force?
c)
i) Is the north pole of a magnet positively or negatively charged?
ii) Is the south pole of a magnet positively or negatively charged?
d) Do the magnetic field lines go from positive to negative, or from negative to positive?
e) If the field lines for a magnet are closer together, does this mean that the magnetic field is stronger or weaker?
2) Where will a compass point if it is not in the magnetic field of a magnet? Why is this the case?
3) The diagram below shows a bar magnet with the north and south pole labelled.
a) Draw the magnetic field lines produced by the bar magnet.
b) We can undertake an experiment with a compass to prove that the magnetic field lines produced by the magnet do look like what you have drawn for part a. Explain the steps for this experiment.
c) Another student suggests using iron filing rather than a compass to find the magnetic field lines produced by the magnet. Why would it be better to use a compass rather than iron filings?
4) How do we show a uniform magnetic field?
5)
a) The north pole of a magnet is placed near to the south pole of another magnet. Add magnetic field lines to the diagram below.
b) We can undertake an experiment with a compass to prove that the magnetic field lines produced by the magnet do look like what you have drawn for part a. Explain the steps for this experiment.
c) Another student suggests using iron filing rather than a compass to find the magnetic field lines produced by the magnet. Why would it be better to use a compass rather than iron filings?
4) How do we show a uniform magnetic field?
5)
a) The north pole of a magnet is placed near to the south pole of another magnet. Add magnetic field lines to the diagram below.
b) Are the two magnets attracted to each other or repulsed?
6)
a) The north pole of a magnet is placed near to the north pole of another magnet. Add magnetic field lines to the diagram below.
6)
a) The north pole of a magnet is placed near to the north pole of another magnet. Add magnetic field lines to the diagram below.
b) Are the two magnets attracted to each other or repulsed?
7)
a) The south pole of a magnet is placed near to the south pole of another magnet. Add magnetic field lines to the diagram below.
7)
a) The south pole of a magnet is placed near to the south pole of another magnet. Add magnetic field lines to the diagram below.
b) Are the two magnets attracted to each other or repulsed?