Table of Contents
Is potential difference directly proportional to distance?
Yes. It is true. Theoretically current is proportional to voltage but mathematically it doesn’t matter.
Does potential difference depend on length?
A superconducting wire has 0 potential difference no matter how long it is. An ordinary wire is slightly resistive, with the resistance proportional to length. If you have a fixed current, then the potential difference necessary to produce that current will be proportional to the length of the wire.
Why are current and potential difference in directly proportional?
Current is the flow of electrons and potential difference is the force with which the electrons are forced to move in the conductor. More the force, more the flow. This is why current is directly proportional to the potential difference !
Is current directly proportional to length?
Hence the current is inversely proportional to length, and so resistance is proportional to length.
How does electric potential change with distance?
Actually, electric potential decreases as you move farther from a charge distribution. That’s because like charges repel each other, so it takes more and more energy to move the charges together the closer you get.
Why potential is inversely proportional to charge?
This value is called the potential V. The electric field does work on a particle to push it towards a point that has a lower potential.
Does potential difference increase with length?
Thus, V will remain constant. Hence, the equation V=Ed means that on increasing length of wire, electric field decreases because the battery simply can not afford any more.
What is the difference between direct and alternating potential difference?
In direct current (DC), the electric charge (current) only flows in one direction. Electric charge in alternating current (AC), on the other hand, changes direction periodically.