Answer:
The poles of the magnetic field generated around the armature are attracted to the opposite poles of the permanent magnet. As the opposite poles align, the commutator reverses the current direction so like poles are aligned and the armature continues to spin.
Explanation:
Answer:
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Explanation:
For equilibrium,
.
So,
= 0
![T_{1} = \frac{8 \times mg}{10}](https://tex.z-dn.net/?f=T_%7B1%7D%20%3D%20%5Cfrac%7B8%20%5Ctimes%20mg%7D%7B10%7D)
= ![\frac{8 \times 90 \times 9.8}{10}](https://tex.z-dn.net/?f=%5Cfrac%7B8%20%5Ctimes%2090%20%5Ctimes%209.8%7D%7B10%7D)
= 705.6 N
Also, for equilibrium
= 0
= 0
or, ![T_{2} = mg - T_{1}](https://tex.z-dn.net/?f=T_%7B2%7D%20%3D%20mg%20-%20T_%7B1%7D)
= ![90 \times 9.8 - 705.6](https://tex.z-dn.net/?f=90%20%5Ctimes%209.8%20-%20705.6)
= 176.4 N
Thus, we can conclude that the tension in the first rope is 176.4 N.