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Why does the rotation of the motor reversed when change the polarity across the main winding coil?
Wiki User
∙ 12y ago
When changing the auxilary face winding connection the current flow in the winding is changed so that the rotating emf direction is changed . Thats why the motor rotates in opposite direction.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoPolarity=current direction. Current direction determines rotation.
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What is the procedure to polarity test a 3 phase transformer?
A 'polarity test' is conducted on a single-phase transformer, not a three-phase transformer (or transformer bank). The polarity of a single-phase transformer being important if two transformers are to be connected in parallel, or three transformers are going to be connected to form a three-phase transformer bank.'Angular displacement' is, to a three-phase transformer, what 'polarity' is to a single-phase transformer. So you really should be asking about angular displacement, rather than polarity. Angular displacement, or 'phase displacement', is the angle by which the secondary line voltage lags the primary line voltage.Angular displacement can be determined either by drawing a phasor diagram of the three-phase connection and measuring it, or by looking up the connection in a vector-group chart/table -you would nor normally 'calculate' angular displacement.
Why is it important that the two capacitors must have their positive terminal toward the transistor?
A: It is not important what is important it that the capacitor has the correct polarity across its terminals otherwise it will not function correctly
What is considered to be the primary side on a step down transformer?
Transformers have windings - typically each winding is designated for a particular voltage. Any one of the windings can be an "output", as any winding can be an "input". Usually for consumers, one of the windings is intended to be 120V for the input. In that case, all of the other windings would be an output.I should also mention that while you can have several outputs, you can only have one input. Some transformers have the windings color coded to designate input and outputs.Hope this helps!
How are the plus and minus voltage signs determined for resistors?
Resistors have no polarity. The voltage across a resistor is determined by the direction of current flowing through that resistor (and vice versa).
When the dc motor is connected across an AC supply then?
It depends on the construction of the motor. If the field winding is connected in series with the armaturewinding, the motor is like a universal motor and will probably operate normally. If the field winding is connected in parallel with the armature, the motor will not run, but will draw current, make noise and get hot.
What determine the polarity of the voltage across a resistor?
A: Current flow only one way form positive to a less positive point. However it is possible to measure negative and positive voltage drop it the meter leads are reversed.
What does x1 stand for on a electrical transformer?
In North America, a transformer's terminals are marked with a combination of letters and numbers. The letter 'H' represents the higher-voltage terminals, while the letter 'X' represents the lower-voltage terminals. Odd numbers (1, 3, etc.) represent the 'start' of a winding, while even numbers (2, 4, etc.) represent the 'end' of a winding. If the potential difference across terminals X1 - X2 is in phase with the potential difference across H1 - H2, then the transformer is described as having 'additive polarity'; otherwise, it has 'subtractive polarity'.
What is the mutual coupling in single phase transformer?
primary winding flux links with secondary winding produses voltage across the secondary winding
Two zener diodes are conected in parallel of vz6.25.1 in opposite polarity across them a 10v dc supply is connected what is the output why?
What the heck is the vz6. Zeners can protect overvoltags from damaging circuits. Two reversed zeners control AC currents.
What is stepup transformer?
A step-up transformer produces a voltage across its secondary winding which is higher than its primary winding. The secondary winding is connected to the load, while the primary winding is connected to the supply.
What are the effects of reverse polarization in electronics?
When a magnet's polarity is reversed, the changing magnetic lines of force cutting across wiring induces a voltage in them. This principle is used primarily in motors. Or perhaps this refers to applying DC power to a device in reverse polarity by mistake. If the device is well designed, it will have a safety diode in the power input area to prevent damage, but if the diode is not present, reversing the power polarity will probably destroy every semiconductor junction in it.
Where are vortexes found in nature?
look in your toilet when you flush,the rotation is a vortex a tornado is a vortex when your sink drains,the rotaion is also a vortex on the other side of the equator,the rotation is reversed Edit: I came across this answer and I think the person was asking about actual locations. There are many vortexes in Arizona, google Arizona vortexes. Many people go to them for meditation and healing purposes.
What would the power loss be if the series field winding of dc motor connected directly across the 240 V dc supply?
Detailed Solution. For a constant back emf, flux is inversely proportional to the speed of the motor. If field winding is disconnected accidentally, the speed would dangerously increase in order to maintain the back emf of the motor
Why is battery not charging light on on your 1998 Cadillac STS when you are reading 13.9 volts across the battery?
Some lights have polarity (e.g., LEDs). Cables could be reversed. Of course bulb could be blown. AND of course, if some type of light doesent come on, such as the check engine light, then you have a bad car :)
What does reversed mean in reflections?
In reflections, "reversed" means that the image appears flipped from left to right compared to the original object. Each point on the object is reflected across the mirror line to create the reversed image.
A composition of reflections across two intersecting lines is a?
Rotation
What causes the and sun to move across the sky?
This is caused by Earth's rotation.
