Tag: making magnets

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Questions Related to making magnets

Multiple choice physics properties of a magnetic field let's make a magnet making magnets making and handling magnets

Identify the methods by which a magnet can be demagnetized.

  1. Heating a magnet strongly

  2. Repeated hammering of the magnet

  3. Storing it aligned with the N-S direction

  4. None of these
Reveal answer Fill a bubble to check yourself
A,B Correct answer
Explanation

Methods by which a magnet can be demagnetized can be given as mentioned below: 
$(1)$ Heating a magnet strongly
$(2)$ Hammering the magnet several times or repeated hammering
$(3)$ By passing an alternating current through the magnet
Hence, the correct options $(A)$ and $(B)$.

Multiple choice physics fun with magnets let's make a magnet making magnets making and handling magnets

When the north pole of a bar magnet picks up an iron nail which of the following are induced in the nail ?

  1. North poles

  2. South poles

  3. A north pole and south pole

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

As the attraction occurs only in between two unlike poles, thus north pole of magnet induces south pole in the nail and north at the other end.

Multiple choice physics fun with magnets let's make a magnet making magnets making and handling magnets

All magnetic materials lose their magnetic properties when:

  1. Dipped in water

  2. Dipped in oil

  3. Brought near a piece of iron

  4. Strongly heated
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Curie- Temperature:
The temperature at which any magnetic field material loses its magnetic property which is at a much higher temperature thus being strongly heated,
Magnets can be demagnetized.
Multiple choice physics properties of a magnetic field let's make a magnet making magnets making and handling magnets

Which all things can be used to make a magnet?

  1. Iron nail

  2. Needle

  3. Blade

  4. Wood
Reveal answer Fill a bubble to check yourself
A,B,C Correct answer
Explanation

Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare-earth metals, and some naturally occurring minerals such as lodestone.

Multiple choice physics properties of a magnetic field let's make a magnet making magnets making and handling magnets

Which of the following process are used to make a magnet?

  1. Casting of magnetic material

  2. Pressing and sintering of magnetic material

  3. Extruding of magnetic material

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Casting of a magnetic material, pressing and sintering of magnetic material and extruding of magnetic material are the processes used for making permanent magnets.