The magnetic length of a bar magnet is 20cm then find its geometric length?
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The geometric length of the bar magnet is 24 cm.
We have to find the geometric length of a bar magnet, the magnetic length of which is 20cm.
Concepts :
- Geometric length : It is the actual length of a bar magnet.
- magnetic length : It is the distance between both the poles of a bar magnet.
- magnetic pole : It is the region where the magnetic field is the strongest. each end of a bar magnet has magnetic pole.
- magnetic length is always less than geometric length of a bar magnet.
- magnetic length is 5/6 times of geometric length of a bar magnet.
Here, mangetic length = 20 cm
∵ magnetic length = 5/6 × geometric length
⇒ 20 = 5/6 × geometric length
⇒ geometric length = 20 × 6/5 = 24 cm
Therefore the geometric length of the bar magnet is 24 cm.
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