Why material of brush is carbon in motors why not other
material.
Answer Posted / ahammed
In carbon brushes, since, its like a semicconducting
material, the resistance of which is depends on area of
contact. Its used to reduce sparking & to avoid short
circuit in armature segments.
| Is This Answer Correct ? | 8 Yes | 6 No |
Post New Answer View All Answers
I need a formula to calculate the size of cable as per load but in the terms of length. Please Reply me as i search lot of sites but i did not get the answer.
In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.
How can we calculate strength of copper hich is supplying electric power to heater and in it hold the heater also and what r all types of forces which is acting on it...
How to convert 2 phase to 3 phase electricpower in induction moter?
How to select HT/MV cable size ?
What happens to voltage when current is zero?
difference between a diode and thyristor?
draw the block diagram of fire alarm?
Explain Continuous and Discrete signals?
Why neutral cable carry current.
How to calculate the sag on transmission Lines.
can some one clearly explain why -48 volt DC use in telecom site????
bus bar design conditions and sizing pls tell me quickly
any idea abt REVERSE METERING concept.........?
how does the terminal voltage of transmission lines increase when a capacitor is connected???? This happens not only in transmission lines but also in all circuits. How??? When a capacitor is connected in a transmission line, capacitor also takes energy from the same supply. But how is it able to increase the terminal voltage??? Practically What sequence of events happen during increase in voltage???