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Fill in the blanks in the following
$(i)$. Artificial magnets are made in different shapes such as __________, __________ and ____________.
$(ii)$. The Materials which are attracted towards a magnet are called________.
$(iii)$. Paper is not a ______ material.
$(iv)$. In olden days, sailors used to find direction by suspending a piece of ___________.
$(v)$. A magnet always has __________ poles.
$(i)$. Artificial magnets are made in different shapes such as bar $\underline{magnet,\ horse\ shoe}$ and $\underline{cylindrical}$.
Explanation:
Artificial magnets are made in three most common shapes such as cylindrical, horseshoe, and bar as shown in the figure below.
.
$(ii)$. The Materials which are attracted towards a magnet are called $\underline{magnetic}$.
Explanation:
Materials that are attracted by magnets are called magnetic materials.
Examples of magnetic materials
Metals like iron, nickel, and cobalt are magnetic materials.
$(iii)$. Paper is not a $\underline{magnetic}$ material.
Explanation:
Paper is not attracted to magnets, so paper is a non-magnetic material. Materials that are not attracted by magnets are called non-magnetic materials.
Examples of non-magnetic materials:
Plastic, rubber, glass, wood, and paper are examples of non-magnetic materials.
$(iv)$. In the olden days, sailors used to find direction by suspending a piece of $\underline{magnet}$.
Explanation:
A magnet can be used to navigate the location due to its directive property. A a freely suspended magnet always pointing in a north-south direction. Compass is a good example of this property.
$(v)$. A magnet always has $\underline{two\ poles}$.
Explanation:
Every magnet has two poles-
1. North Pole$(N)$
2. the South Pole$(S)$
Here N denotes the North Pole of the magnet and S denotes the South Pole of the magnet.
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