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If two waveforms are out of phase by 90 degrees, this is a quarter cycle. If you are looking at a symmetric sine wave that oscillates around zero then one wave will be at its peak value when the other will be at zero crossing point.

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Q: When two waveforms are out of phase by 90?
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What is phase difference between input and output waveforms of ce amplifier?

180 degree phase shift


Why 2 phase induction motors are not used in industries?

A two-phase* system is archaic, and has been completely superceded by three-phase systems, so there is no demand for two-phase induction motors. (*A two-phase generator has two phase windings, displaced from each other by 90 degrees.)


What are the parameters that the output voltage and current waveforms depend on it?

waveforms depend on it


What will happen if two phase supply given to the single phase motor?

Two phase is single phase for today's purposes. We generally do not call 240v single phase "two phase" anymore, although technically that's what it is. 240v two phase has power to both lines to the motor versus 120v single phase has one power line and a neutral. Fortunately most single phase motors today are dual voltage. So check your nameplate data of the motor for guidance. The use of proper motor protection will prevent any damage to motors if wrong voltages are inadvertantly applied.CommentA two-phase system is an archic system, in which two phase voltages are displaced from each other by 90 electrical degrees. Like three-phase, it had the advantage of producing a naturally-rotating magnetic field, so could drive induction motors without any need for a starting capacitor.


Why is a capacitor connected in series with starter winding?

In single phase motors, there are two windings. 1)Main winding 2) starter (auxiliary) winding. As per the double revolving theory in 1 phase machines, motor can rotate if current in the starter winding have near to 90 deg. phase shift wrt main winding. Now current flowing through capacitor leads by 90 deg. Ideally. So this is how we can get two currents which are having phase shift wrt each other. And the machine can rotate.

Related questions

What is time phase quadrature?

Quadrature phase occurs when two periodic waveforms have a phase difference of 1/4 of their output period.


What is in phase and out of phase?

The phase relationship relates to how the waveforms superimpose in time. For two signals of the same frequency they are in phase when there zero crossing times coincide. When out of phase the zero crossings don't overlap in time.


What is phase difference between input and output waveforms of ce amplifier?

180 degree phase shift


Why do you use a phase advancer to improve the power factor?

Power Factor measures how much the current and voltage waveforms are out of phase. You get most efficient power transfer when the sine waves for voltage and current exactly match. When you multiply peak voltage and current you get the largest power. Depending on the phase relationships, you can bring the voltage and current waveforms into phase when you retard one or advance one against the other. Power Factor ranges from zero when the waveforms are 180 degrees out of phase to one when they are exactly in phase.


What is Physical interpretation of in phase and out of phase?

Two locations are said to be "in phase" when the waveform is "lined up" so there is no voltage difference between the two points.They are out of phase if there is a voltage difference between them.If you are looking at an oscillograph reading of both, if they are in phase the waveforms will be identical magnitude at the same time. If out of phase, one will be shifted relative to the other causing a voltage difference.


What is phase opposition disposition modulation?

For phase opposition disposition (POD) modulation all carrier waveforms above zero reference are in phase and are 180 out of phase with those below zero.


How do you add and subtract two sinusoidal ac waveforms graphically and by phasor diagram?

I already have the graph drawn on graph paper with 2 waves on , my phase shift is 1.5 and 180degrees. Anyone know how to add and subtract the sinusoidal ac waveforms on the graph, and by phasor diagram?


Why Scott connection is used to convert three phase to two phase why cant you take two lines from three phase circuit?

In a two-phase connection, the phases are displaced by 90 degrees. Two lines (not 'phases') of a three-phase system will provide a single-phase supply, not a two-phase supply.


Why 2 phase induction motors are not used in industries?

A two-phase* system is archaic, and has been completely superceded by three-phase systems, so there is no demand for two-phase induction motors. (*A two-phase generator has two phase windings, displaced from each other by 90 degrees.)


What is the X-Y operation of the oscilloscope?

The CRT display becomes an electronic graph of two instantaneous voltages. The display may be a direct comparision of two voltages such as during phase measurement, or frequency measurement with Lissajous waveforms.


What is the phase between two phase line?

A two phase line is split phase. That's the same as in you home.Hot 1 is 120VAC to Neutral.Hot 2 is 120VAC to Neutral, and is 180 degrees aways from Hot 1.Hot 1 is 240VAC to Hot 2.Neutral is grounded at the distribution panel, at the street, and at the substation.AnswerTwo-phase systems are very rare, these days, as they have been completely replaced by three-phase systems. So two-phase systems are mainly of historical interest only. A two-phase generator comprises two phase windings which are physically displaced from each other by 90 degrees, so the resulting phase voltages are 90 electrical degrees apart, producing a line voltage that is 1.414 times the phase voltage (i.e. the vector sum of two phase voltages displaced by 90 electrical degrees).The system described in the original answer is a split phase system, which is quite different to a two-phase system.


How does three phase energy meter works with two phase supply?

It's unlikely you have a two-phase supply. Two-phase systems (two phases, displaced by 90 electrical degrees) are very old, and there are very few two-phase systems around. Assuming you really mean 'two phase', t's unlikely, therefore, that you can use a three-phase energy meter using its standard terminals.