Does Ohm's law hold true for materials with zero resistance?

  • Thread starter Thread starter Sefrez
  • Start date Start date
  • Tags Tags
    Law Ohm's law
AI Thread Summary
Ohm's law states that current is proportional to voltage, but in materials with zero resistance, applying a potential difference theoretically leads to infinite current. Charged particles accelerate in an electric field but typically reach a terminal velocity due to collisions within the conductor. In an ideal scenario with a zero-resistance material and perfect voltage supply, current would approach infinity. However, real-world conditions prevent the existence of such perfect materials. The discussion highlights the theoretical implications of zero resistance while acknowledging practical limitations.
Sefrez
Messages
124
Reaction score
0
Hopefully this is a simple question.

When a potential difference is applied, do charged particles begin to accelerate and then reach a terminal speed due to resistance where resistance would have to be proportional to that speed? In other words, if there was this magical material with zero resistance and a magical supplier, would i → ∞ as the equation shows?
 
Physics news on Phys.org
The charged particles begin to accelerate when they feel electric field, but reach terminal velocity very soon because of collisions with the ions of the conductor and with each other.

In case of a piece of zero-resistance metal and ideal voltage supply, the current will be infinity. But nothing is perfect :tongue2

ehild
 
Ok, that is what I figured. Thanks. :)
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »

Similar threads

Connection between V vs I graphs and Ohm's Law
Replies
7
Views
6K
Ohm's Law Validity: Does it Change with Heat?
Replies
1
Views
2K
Resistive dissipation and Ohm's law
Replies
5
Views
2K
Why do the headlights on the car become dim when the car is starting?
Replies
4
Views
2K
How Does Ohm's Law Apply to Different Electrical Scenarios?
Replies
3
Views
5K
Voltage change when resistance is zero
Replies
12
Views
2K
Why Are Currents Through 3 and 4 Ohm Resistors Zero in an Open Circuit?
Replies
25
Views
7K
Does an alternator obey Ohm's law?
Replies
3
Views
2K
Does the mass of an object affect its inertia?
Replies
6
Views
2K
I Why does resistance reduce current in whole circuit?
Replies
38
Views
5K

Hot Threads

Recent Insights

Back
Top