Why the brushes used in dc machines are made of carbon not
from other metal?
- 2 Answers
- 7226 Views
- I also Faced
- E-Mail Answers
Answer Posted / niranjan reddy
because the carbon is of less cost. and as frequent wear and
tear will occur to the brush due to rotation of the
motor...carbon is most economical.
and frm conduction point of view also it is good..so carbon
is used
| Is This Answer Correct ? | 10 Yes | 2 No |
Post New Answer View All Answers
what is the internal working of star delta starter
If 24 KVA AVR having Input voltage 200-400v, Output voltage 415+-1%, what will be the voltage if Load is 13A.
which type of amplifiers are used in multimete?
what does mean of RCT and STR in diffrential CT?
Show Details FROM:Muhammed Ikram TO:qa@allinterview.com Message flagged Saturday, June 4, 2011 10:07 PMMessage bodyHello all, i want to ask a question to all of you that what is VMM (voltage monitoring module )? how it work,s? i heard somewhere that it compare 1 phase voltage to other phase voltage. but there is also some setting on it. how to set it,s setting. please tell me briefly. Thank,s and Regard,s. Muhammed Ikram.
how to do the ductor test?
defination of controlled shunt reactor
for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.
what is the string efficiency
how much cable size required for 70 kilowatt load.
How to calculate Air conditioning capacity for a telecom BTS shelter?
magnetizer priciple
A cylindrical wire is compressed in length by 10%. The percentage decrease in the resistance will be?????
What is the lifetime of a Thyristor? Is there a recommended lifetime for thyristors after which they should be replaced?
Can 33kva/415v transformer be run underground? If the answer is yes why and if the answer is no why?
