PRE-LAB PREPARATION SHEET FOR LAB 9-MAGNETISM (Due at the beginning of lab) Dire
ID: 1781760 • Letter: P
Question
PRE-LAB PREPARATION SHEET FOR LAB 9-MAGNETISM (Due at the beginning of lab) Directions: Read over Lab 9 and then answer the following questions about the procedures. 1. Describe briefly what types of observations you will make in Activities 1-1 and 1-2 to examine the interactions of magnetic poles with various objects and with each other. 2. How will you determine in Activity 1-4 which pole of your magnet is North and which is South? 3. How will you determine the direction of magnetic field lines around a bar magnet in Activity 1-6? How will you measure the strength of the magnetic field around a bar mag- net in Extension 1-7. 4. 5. What does the Lorentz force law describe? Lorentz folce o the LombnExplanation / Answer
1) Like ends will repel each other while unlike ends will attract each other.
This is the general rule, same for both poles and charges, that like will repel and opposite(unlike) will attract.
As for the existence of a separate north or a separate south pole, magnetic monopole does not exist. That is to say that North and south poles cannot exist independent of each other.
But for the charges, positive and negative charges can exist independently.
2)
By simply looking at the magnet one can tell about the polarities. The north end is red colored while the south end is blue colored.
Sometimes it may happen that the color has disappeared due to wear and tear or otherwise. In such a situation, suspend the magnet freely, the north pole will point in the geographic north pole of the Earth.
On breaking the magnet into smaller pieces, it still behaves as a magnet, with both north and south poles.
3)
The magnetic field lines of a bar magnet can be traced out with the use of a compass. The needle of a compass is itself a permanent magnet and the north indicator of the compass is a magnetic north pole. The north pole of a magnet will tend to line up with the magnetic field, so a suspended compass needle will rotate until it lines up with the magnetic field. Unlike magnetic poles attract, so the north indicator of the compass will point toward the south pole of a magnet. In response to the Earth's magnetic field, the compass will point toward the geographic North Pole of the Earth because it is in fact a magnetic south pole. The magnetic field lines of the Earth enter the Earth near the geographic North Pole.
4) Using magnetic field sensor.
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