AC Voltage at Point X on Wire: Positive and Negative Half Cycle

In summary, the potential at a point on a wire subject to AC supply will be the same as the AC source voltage, just delayed by a tiny bit. The AC waveforms shown will be a sine wave.
  • #1
amaresh92
163
0
greetings,

consider a wire which is subjected to AC supply.now consider a point X anywhere on wire.
now what will be the potential of that point during the positive and negative halfcycle of sinusoidal AC?what will be the direction of current?
thanks
 
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  • #2
not only you need X, you also need time. then you need the graph of the ac source
 
  • #3
amaresh92 said:
greetings,

consider a wire which is subjected to AC supply.now consider a point X anywhere on wire.
now what will be the potential of that point during the positive and negative halfcycle of sinusoidal AC?what will be the direction of current?
thanks

What do you think? Why don't you draw a sketch of an AC voltage source driving a resistor divider. Sketch the AC waveforms -- what do they show?
 
  • #4
An easy way to answer your question is to consider that at the point some distance from the source, the voltage (potential) will be exactly like the source voltage, just delayed a tiny bit in time to account for the finite speed of the voltage transmission...assuming the wire is a few inches or feet not tens of thousands of miles...so you have answered your own question in your post...
 
  • #5
berkeman said:
What do you think? Why don't you draw a sketch of an AC voltage source driving a resistor divider. Sketch the AC waveforms -- what do they show?


what kind of thing the voltage?
 
Last edited by a moderator:
  • #6
You can check the rms values of AC voltages. Suppose if you have 220Vrms than it means your AC waveform is a sine wave having positive peak of 311 volts and negative peak of 311 volts. This means peak to peak voltages are 311+311=622 volts.
Peak Voltage = RMS Voltage x square root of 2
Thanks
 
  • #7
ssana said:
Peak Voltage = RMS Voltage x square root of 2
Thanks

Only on a sine wave.
 
  • #8
Usually sine wave is generated from the generator coil. The alternate wave is not necessary a sine wave. It can be sawtooth wave or any alternate cycles. The above mentioned formula to calculate rms voltage is for the sine wave.
 

1. What is AC voltage at point X on a wire?

AC voltage at point X on a wire is the measurement of the alternating current (AC) electrical potential difference between two points on a wire. It is typically measured in volts (V).

2. What is the difference between positive and negative half cycle in AC voltage?

In AC voltage, the positive half cycle refers to the part of the cycle where the voltage increases from 0 to its maximum value, while the negative half cycle refers to the part where the voltage decreases from its maximum value back to 0. This is due to the alternating direction of the current flow.

3. How is AC voltage measured at point X on a wire?

AC voltage at point X on a wire can be measured using a voltmeter, which is a device that measures the potential difference between two points in an electrical circuit. The voltmeter can be connected to the wire at point X to obtain the voltage reading.

4. What factors affect the AC voltage at point X on a wire?

The AC voltage at point X on a wire can be affected by various factors such as the frequency of the AC current, the resistance of the wire, and the presence of other electrical components in the circuit. Changes in these factors can result in fluctuations in the voltage at point X.

5. Why is AC voltage at point X important to measure?

AC voltage at point X is important to measure as it gives information about the state of the electrical circuit and can help identify any issues or problems in the circuit. It also allows for the proper functioning of electrical devices and ensures safety by monitoring the voltage levels.

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