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babunello [35]
2 years ago
12

Why are carbon brushes used? How do these work?

Physics
2 answers:
andreev551 [17]2 years ago
7 0

Answer:

A carbon brush is a sliding contact used to transmit electrical current from a static to a rotating part in a motor or generator, and machines, ensuring a spark free communication. Carbon brushes are also used in electric motors to provide a path for flow of current.

Explanation:

Zepler [3.9K]2 years ago
6 0

Answer:

Why are they used:

A carbon brush is a sliding contact used to transmit electrical current from a static to a rotating part in a motor or generator, and, as regards DC machines, ensuring a spark-free commutation.



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Answer:

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So, z1 = 0 and z2 is unknown

Now, we want to find v2 and z2 when the internal, kinetic and potential energy are equal.

Thus Equating the formula for both kinetic and internal energy gives;

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m will cancel out and v1 is zero to give;

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z2 = (c_v•ΔT)/g

z2 = 718 × 10/9.81

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