In the below figure, tube A contains copper filings and tube B contains aluminum fillings. If a strong magnet is brought close to the two tubes as shown in the figure, then(a) Center of gravity of tube A moves towards the right(b) Center of gravity of tube B move towards the right

# In the below figure, tube A contains copper filings and tube B contains aluminum fillings. If a strong magnet is brought close to the two tubes as shown in the figure, then(a) Center of gravity of tube A moves towards the right(b) Center of gravity of tube B move towards the right

1. A
Only (a) is true
2. B
Only (b) is true
3. C
Both (a) and (b) are true
4. D
Neither (a) nor (b) is true

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### Solution:

Concept: The phenomenon of magnetism. After that, we'll talk about how copper and aluminum behave magnetically when exposed to magnetic fields.
Magnetic objects are drawn to or repelled by the force of magnetism. These magnetic fields, which permeate various media, act as a medium for this force. Magnetism is a characteristic of some materials by default. However, depending on the situation, some materials can be magnetized or demagnetized.
At the fundamental level, electrons, much like an electric current, are what create magnetic. Due to the spin of electrons, a small dipole magnet results. The net force is 0 while these spins are balanced. But when there are enough unpaired electrons present, this infinitesimally low magnetic moment increases. A noticeable magnetic field is produced around the metal as a result.Magnetic fields can be produced by electrical current, and vice versa. As an electric current travels through a cable, this creates a circular magnetic field around the wire. Similar to this, when a good electrical conductor is near a magnetic field, electrical currents start to flow inside the conductor.
All matter is magnetic if you have a powerful enough magnetic field. However, copper has such a small magnetic field that it is impossible to perceive without extremely strong magnetic fields. We can therefore conclude that copper is not magnetic, even in the presence of a bar magnet.
Although copper is not magnetic in and of itself, it does interact with magnets, which is very important. The energy that we use every day is created by power plants using this magnetic interaction.
Normally, aluminum has no magnetic properties. The crystal structure of aluminum may be the cause of its lack of magnetic. One can see the magnetism shades as it moves through a magnetic field and is thrown along thick aluminum pipes with high-quality magnets.
Even in the presence of powerful magnetic fields, copper has a very weak magnetic field and cannot be observed to exhibit any magnetic behavior (those generated using the given bar magnet) .
As a result, the copper filings in tube A won't move, and as a result, its center of gravity stays where it was before the magnetic bar produced a powerful magnetic field.
However, aluminum becomes mildly magnetic in the presence of strong magnetic fields produced by the placed bar magnet.
Hence, the correct option is 2.

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