Definition of Voltage

  • Thread starter ckboii89
  • Start date
  • #1
13
0

Homework Statement


If KVL was not true, would our definition of Voltage still make sense? Clearly explain and prove your answer


Homework Equations


KVL definition
Voltage definition

The Attempt at a Solution


I said no, because if KVL were not true, then definition of voltage would not make sense. By the law of energy conservation, Energy input = energy output( i may be wrong? but intuitive to me, since a circuit is a closed system). Since voltage by definition is the energy required to move 1C of charge from 1 node to another. The sum of voltages in a closed system must equal 0, since a system cannot have excess energy, as it must be either used,stored or dissipated

Thoughts guys? Proff made this question, and ive never come across a theoretical question like this in a engineering course
 

Answers and Replies

  • #2
Simon Bridge
Science Advisor
Homework Helper
17,857
1,655
You need a statement of the definition of voltage.
 
  • #3
13
0
The definition my proff gave me is this: Voltage is the energy required to move 1c of charge from 1 node to another
 
  • #4
Simon Bridge
Science Advisor
Homework Helper
17,857
1,655
Generally - one volt is the energy required to move 1 coulomb from one node to the next... what if there is a battery between the two nodes? What if the end node is the same as the start node?

The next step is a statement of what KVL says ... then you want to relate the two.
The KVL requires a specific property of the electric field - besides energy conservation - do you know what it is?

Anyway - the patter for these things is:
1. definition of voltage
2. statement of KVL
3. what does 2 say about 1.
4. if 2. is wrong, what does that say about 1.

For the record: you have the right idea - but you were instructed to be clear.
 

Related Threads on Definition of Voltage

  • Last Post
Replies
1
Views
1K
Replies
2
Views
3K
  • Last Post
Replies
2
Views
514
Replies
2
Views
2K
Replies
7
Views
2K
Replies
0
Views
1K
Replies
4
Views
4K
  • Last Post
Replies
3
Views
3K
  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
0
Views
968
Top