why field resistance is higher than armature resistance in
dc machines? and why filed resistance is kept at min value
at starting in same time of armature resistance at max value?
Answer Posted / sai
To allow the maximum current through the armature, resistance is kept to very low value. According to ohm's law, V=IR.
As R is very low then current becomes maximum.
| Is This Answer Correct ? | 21 Yes | 10 No |
Post New Answer View All Answers
What kind of preventive maintenance are there for transformer?
how to commissioning the genset with amf panel?
What is center gravity load in substation?
HOW THE OLTC TRANSFORMER SAVE ENERGY IN COMPARISON TO OFF LINE TRANSFORMER AND IS IT ECONOMICAL TO REPLACE THE OFF LINE TRANSFORMER TO OLTC TRANSFORMER
How will A Medium voltage circuit breaker(11 kV voltage level) operate under short circuit fault condition whether It is having short circuit release like Low voltage circuit breaker or relay should be given?
In the Variable Voltage Variable Frequency Drive, how the Voltage and Frequency varied ? Is it varied in the Inverter part of the Drive ? Please give us supporting document if any.
What is ideal IR values for ground and neutral.
what you have to see after one week or month from the day of installation of transformer ?
write down the formula of cable size in RM if current is 50Amp.
any body,pls tell me how to done relay coordination ? how to coordinate by TCC curve?how to read the tcc curve?
Define branch?
where we use the SFU & FSU?
EXPLAIN USE OF ROCKING ARRANGEMENT IN ELECTRIC HEATING?
How could a garment factory benefit from renewable energy
What shall be the secondary output voltage if the primary winding of a 220/6V, 50 Hz transformer is energized by an 110V, 60 Hz supply?