Ground is always considered at 0 Volt?

In summary, the ground is always considered at 0 volts and this causes a lack of potential difference for current to flow, resulting in the bulb not glowing. However, if there is a potential difference, such as when one source offers 5 volts and the other offers 15 volts, then the bulb will glow. This is because there is a difference of 10 volts, allowing for current flow. Additionally, ground can be any voltage as long as all other voltages are stated relative to it.
  • #1
otomanb
59
0
ground is always considered at 0 Volt?
Will this bulb glow and why?

faapp3.jpg
 
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  • #2
No as there is no potential difference to allow current to flow.
 
  • #3
hi otomanb
Welcome to PF :)

Generally yes its the 0V.

umm just trying to decypher your diagram it appears to show the 2 positive terminals connected to the lamp and the 2 negative teminals connected together.

In this case the lamp WONT glow as there can be no current flow

cheers
Dave
 
  • #4
your actual subject question doesn't have anything to do with the
circuit diag you have posted and the question you asked about current flow
the 2 questions are not related :)

Dave
 
  • #5
and if one source offers 5 volt and other offers 15 volt ? will bulb glow?
because now there is a potential difference as it's called voltages!
 
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  • #6
Yes, because there is a potential difference then.

Ground can be any voltage you like as long as you state all other voltages relative to ground. So you could call ground 100V and state all the other voltages relative to this if you wanted... there just isn't much point in doing so.
 
  • #7
because i tested this thing with a software livewire 1.1 . the bulb glows if one battery provides 15 v and other 5v. And as there is a difference of 10 volts.
 

FAQ: Ground is always considered at 0 Volt?

1. Why is ground always considered at 0 Volt?

Ground is considered at 0 Volt because it is the reference point for measuring electrical potential. In a circuit, ground acts as a common point of connection for all components and serves as a point of reference for measuring voltage and current.

2. Is ground always at 0 Volt?

In theory, ground should always be at 0 Volt. In practical applications, however, there can be small variations due to factors such as resistance and stray capacitance. These variations are typically negligible and do not affect the overall functioning of the circuit.

3. Can ground have a positive or negative voltage?

No, ground is always considered to have a voltage of 0 Volt. This is because it is the reference point for measuring voltage in a circuit. However, it is possible for a voltage source to have a positive or negative voltage with respect to ground.

4. Why is ground important in electrical circuits?

Ground is important in electrical circuits because it provides a safe path for excess electrical energy to flow to the Earth, preventing damage to the circuit and potential harm to individuals. It also serves as a reference point for measuring voltage and ensures that all components in a circuit are operating at the same potential.

5. Can ground be bypassed or omitted in a circuit?

It is not recommended to bypass or omit ground in a circuit as it serves an important purpose in ensuring the safety and proper functioning of the circuit. However, in some cases, ground may be omitted if it is not critical for the operation of the circuit or if it is replaced with a suitable alternative, such as a virtual ground.

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