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Could the neutral point voltage be like phase voltage?
Yes,when the neutral potential is at ground potential i.e., 0v.
Why neutral ground voltage is 120v sometime 0v?
There should be no voltage on the neutral wire to ground. This is a serious situation. Call a qualified electrician to check this out.
Measure the voltage across a voltmeter and a switch?
If the switch is closed (connected) the voltage across it will read 0V. If the switch is open (disconnected) the voltage across it could be anything, it just depends on what the voltage between the wires going into the switch is.
If a negative current enters a negative voltage will it be negative or positive?
A current is never concidered negative. The current will always flow from a higher voltage to a lower.For example:12 -> 0V as 12V is a higher potential than 0V. The current is measured in Ampere.0V -> -12V as 0V is a higher potential than -12V. The current is measured in Ampere. Not negative Ampere despite the fact that it floats from the 0V potentialAnswerThe term 'negative', in the sense of 'polarity', doesn't apply to either current or voltage (potential difference), although it does apply to potential -so, the previous answer should read that current 'flows from a higher potential to a lower potential', not 'from a higher voltage to a lower voltage'.However, we do use the terms 'negative' and 'positive' in the sense of 'sense' or 'direction'. So, when we talk about a 'negative voltage', what we mean is a voltage that is acting in the opposite direction to another voltage -for example, if we consider the direction in which a battery's voltage (E) to be acting to be 'positive', then any resulting voltage drop (V) will be acting in the 'negative' direction -i.e. E - V = 0 (i.e. the algebraic sum of the voltages around that circuit is zero).In the same way, we can describe current as being 'positive' or 'negative' in the sense of its direction. For example, if one current (I1) is approaching a junction, and two currents (I2 and I3) are leaving that junction, we can write: I1 - I2 - I3 = 0 (i.e. the algebraic sum of the currents at that junction is zero).Unfortunately, this doesn't specifically answer your question which, unfortunately, is rather confusing and needs to be rephrased.
What are the typical switching voltages that may be applied to the inputs of a PLC?
Look on the datasheet. But most are either TTL compatible (0V to 5V) or low voltage TTL compatible (0V to 3.3V). Some have open drain outputs that can handle higher output voltages by using a pullup resistor.The important thing is always consult the datasheet to know for certain on a specific device.
When a voltmeter is place across a forward biased diode it will read a voltage?
(A) The bias battery voltage (B) 0V (C) the diode barrier potentiaol (D) The total circuit voltage
How much voltage a 0v bulb need to glow?
Some small voltage above 0.
In a circuit what is zero volt rail?
A zero volt rail is a rail that is connected to 0V... What do you think it is? The 0V rail is often used as a common ground, although obviously it relies on your ground voltage being 0V.
Could the neutral point voltage be like phase voltage?
Yes,when the neutral potential is at ground potential i.e., 0v.
What is the correct voltage of a chemical cell that has reached equilibrium?
The difference in voltage on the electro-chemical series of the 2 constituent elements.
Why neutral ground voltage is 120v sometime 0v?
There should be no voltage on the neutral wire to ground. This is a serious situation. Call a qualified electrician to check this out.
What is the total voltage of 2 1.5 voltage cells where the minus is facing the minus?
1.5V if measured across the + and - terminals, otherwise 0V. When measured at points with identical potential (voltage), there is no difference between voltage levels and no current flows.
Measure the voltage across a voltmeter and a switch?
If the switch is closed (connected) the voltage across it will read 0V. If the switch is open (disconnected) the voltage across it could be anything, it just depends on what the voltage between the wires going into the switch is.
What is an alternating current?
One whose direction and voltage (hence current) alternate harmonically, the latter above and below 0V.
If a negative current enters a negative voltage will it be negative or positive?
A current is never concidered negative. The current will always flow from a higher voltage to a lower.For example:12 -> 0V as 12V is a higher potential than 0V. The current is measured in Ampere.0V -> -12V as 0V is a higher potential than -12V. The current is measured in Ampere. Not negative Ampere despite the fact that it floats from the 0V potentialAnswerThe term 'negative', in the sense of 'polarity', doesn't apply to either current or voltage (potential difference), although it does apply to potential -so, the previous answer should read that current 'flows from a higher potential to a lower potential', not 'from a higher voltage to a lower voltage'.However, we do use the terms 'negative' and 'positive' in the sense of 'sense' or 'direction'. So, when we talk about a 'negative voltage', what we mean is a voltage that is acting in the opposite direction to another voltage -for example, if we consider the direction in which a battery's voltage (E) to be acting to be 'positive', then any resulting voltage drop (V) will be acting in the 'negative' direction -i.e. E - V = 0 (i.e. the algebraic sum of the voltages around that circuit is zero).In the same way, we can describe current as being 'positive' or 'negative' in the sense of its direction. For example, if one current (I1) is approaching a junction, and two currents (I2 and I3) are leaving that junction, we can write: I1 - I2 - I3 = 0 (i.e. the algebraic sum of the currents at that junction is zero).Unfortunately, this doesn't specifically answer your question which, unfortunately, is rather confusing and needs to be rephrased.
What is a precision diode?
A precision diode is a diode with 0V (or near 0V) voltage drop when forward biased, unlike a normal diode which has a finite forward voltage drop of typically 0.2 to 0.8V depending on diode technology.It is typically implemented with an Operational Amplifier that has a normal diode somewhere in it's feedback path. The circuit utilizes the gain of the Op-Amp to compensate for the finite voltage drop of the diode. Several variations of the implementation exists.Some applications for precision diodes areRectification or detection of signals with low amplitudeVoltage gating (selection of the highest or lowest of several voltages)Voltage references (replacing Zener diodes)
What type of a wiring system if the voltage across the 2 hot wires is the same as the voltage of each hot wire when measured against the neutral wire?
The only way I can imagine getting these readings is if something is wrong with the circuit. If the circuit is off, then you get 0v on each of the readings, of course. In any case, if you are getting the readings as you describe, you have an electrical problem that will require a competent electrician to solve.
