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When the rheostat position is changed from minimum position to maximum position in motors what will happens?
Wiki User
∙ 13y ago
the back emf increases so that high currents doesn't pass through the field windings
Wiki User
∙ 13y ago
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Why motor rheostat kept minimum position generator rheostat maximum position?
the back emf increases so that high currents doesn't pass through the field windings
Why the armature rheostat of dc is motor kept at maximum resistance position?
It isn't. It is only kept at maximum resistance when the motor is not running. That is done to limit the starting current.
What will happen if field rheostat of dc shunt motor is kept at maximum position while starting?
First remember this rheostat is connected in series with the armature to increase the total resistance to limit the starting current, thus achieving max starting torque from the motor
Why armature rehostat is kept at maximum position?
In a series DC motor used for traction, the armature rheostat is there to limit the current on starting. In normal running the rheostat is set to zero ohms (maximum power) so that power is not wasted in it. At full speed the power is turned off, the vehicle then coasts along until it's time to stop.
Why the generator field rheostat kept at maximum position?
There is nothing to limit current until opposing magnetic fields build up at generator operating speed-windings will overheat and burn.
What is maximum at mean position for particle performing simple harmonic motion?
Velocity is maximum at mean position for particle performing simple harmonic motion. Another feature that is maximum at this position is kinetic energy.
Wave maximum displacement from the rest position?
The correct term from the maximum displacement from the rest position in a wave is the Amplitude (A).
Why rheostats have current rating in addition to resistance rating?
A resistor, of which a rheostat is, has a maximum amount of current it can handle. Beyond that value it will start heating up a lot and might burns up. Since, the maximum resistance of a rheostat is fixed so does its maximum safe current value that can flow through it.Comment'Rheostats' and 'potentiometers' describe applications of variable resistors; they are not alternative words for variable resistors.
What does the acronym POMO mean?
POMO Position Of Maximum Opportunity POMO Point of Maximum Opportunity
What does amplitude mean?
The maximum movement from the middle position.
What is a resistor that can be adjusted between minimum and maximum by turning a dial is called a what?
It is a variable resistor. Basically, the same as when you turn up or down the heat on an electrical oven or radio.
What is the maximum distanced that matter is displaced from the resting position?
It is amplitude
