# Robotics

Topics: Alternating current, Voltage, Electric current Pages: 16 (3702 words) Published: March 26, 2013
3/25/13

How does current flow in an AC Circuit. | CrazyEngineers

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How does current flow in an AC Circuit.
Discussion in 'Electrical | Electronics | Communications' started by neo23, Aug 26, 2011. Page 1 of 2 1 2 Next >

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Kaustubh Katdare

I am extremely confused about the direction of ac current flow in the circuit. If current reverses its direction for every positive and negative half , so in that case does that mean that - electrons flow from phase to neutral in positive half cycle and , similarly for negative half cycle electrons flow from neutral to phase.? Please clear my views regarding this..... Like x 1 neo23, Aug 26, 2011 #1

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neo23
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narayana murthy, Aug 26, 2011

#2

narayana murthy
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Praveen-Kumar, Aug 26, 2011

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Praveen-Kumar
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neo23 said: ↑

I am extremely confused about the direction of ac current flow in the circuit. If current reverses its direction for every positive and negative half , so in that case does that mean that - electrons flow from phase to neutral in positive half cycle and , similarly for negative half cycle electrons flow from neutral to phase.? Please clear my views regarding this.....

A.V.Ramani
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Biomedic al

You are right. However, the distances moved are rather small. In a copper wire the velocity of electrons is about 300 microns/second. In a half cycle at 50 Hz this translates to just 3 microns. So one can say the electrons vibrate about a mean position about 3 microns in 50Hz ac circuits.

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3/25/13
A.V.Ramani, Aug 26, 2011

How does current flow in an AC Circuit. | CrazyEngineers
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neo23
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Still in doubt...Does that mean that electrons vibrate back and forth their mean position? Do they not travel all the way from source to load and then back? And one more doubt .... if AC reverses direction THEN WHAT DIFFERENCE IS THERE BETWEEN PHASE AND NEUTRAL? AS I HAVE LEARNED THAT PHASE HAS THE POTENTIAL AND NEUTRAL IS 0V. REVERSING DIRECTION OF CURRENT IN THE NEGATIVE HALF CYCLE CLEARLY INDICATES THAT THE NEUTRAL ATTAINS POTENTIAL AND CURRENT STARTS FLOWING BACKWARDS FOR THAT CYCLE?PLEASE CLARIFY THE DOUBTSREGARDS neo23, Aug 27, 2011 #5

Elec tric al & Elec tronic s

neo23 said: ↑

Still in doubt...Does that mean that electrons vibrate back and forth their mean position? Do they not travel all the way from source to load and then back? And one more doubt .... if AC reverses direction THEN WHAT DIFFERENCE IS THERE BETWEEN PHASE AND NEUTRAL? AS I HAVE LEARNED THAT PHASE HAS THE POTENTIAL AND NEUTRAL IS 0V. REVERSING DIRECTION OF CURRENT IN THE NEGATIVE HALF CYCLE CLEARLY INDICATES THAT THE NEUTRAL ATTAINS POTENTIAL AND CURRENT STARTS FLOWING BACKWARDS FOR THAT CYCLE?PLEASE CLARIFY THE...