Question

the magnetic length of a bar magnet is 5cm.The distance of each pole from the nearest end is what?​

Answer 1

The distance of each pole from the nearest end is 5 cm.

Explanation:

• The distance between two poles are called as magnetic length.
• A magnet has two poles namely north and south poles.
• The measurement of the length of the bar magnet is called geometric length.
• The minimum distance between two poles is called as effective length.
• The effective length is always less than the geometric length because the poles are not exactly at the ends.

Answer 2

Given:

Magnetic length, ML = 5 cm

To Find:

The distance from the nearest end = ?

Solution:

As we know,

⇒  $Magnetic \ Length,ML=\frac{5}{6} \ GL, Geometric \ Length$

From the above equation, we get

$GI=5\times \frac{6}{5}$

⇒   $=6 \ cm$

Now, let the nearest end will be "x".

Distance, $x=\frac{(GL-ML)}{2}$

On putting the values, we get

⇒                 $=\frac{(6-5)}{2}$

⇒                 $= \frac{1}{2}$

⇒                 $=0.5 \ cm$

So that the distance of each pole from the nearest end will be "0.5 cm".