Electronics - Magnetism and Electromagnetism - Discussion

2. 

Which electromagnetic device uses brushes and a commutator?

[A]. A speaker
[B]. A dc generator
[C]. A relay
[D]. A solenoid

Answer: Option B

Explanation:

No answer description available for this question.

Mad said: (Mar 7, 2012)  
How it is useful in the generators?

Kiran said: (Aug 24, 2012)  
Commutator genartes ac signal tht must b coverted into ac hence brushes are used.

Javed Jamadar said: (Oct 13, 2013)  
Brushes helps in conduction and free rotation with electric conductivity.

Aditi said: (Feb 1, 2014)  
Kindly brief about commutator?

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.