0
As the resistance of a material decreases does the efficiency of power transmission increase If so is it linear relationship and what about superconductors?
Wiki User
∙ 15y ago
Yes, the efficiency increases. Yes, it is linear. Power lost in a current-carrying conductor is: P = I^2 * R So, if you halve the resistance, you halve the power loss. Note though that the current (I) term is squared. So if you can decrease the current by increasing the transmission voltage, the increase in efficiency is not linear, but exponential! Halve the current (and double the voltage to get the same power), and you reduce losses by four times! This is why utilities use such high voltages for transmission. Superconductors are no different, you are still talking about a reduction in resistance, superconductors just achieve a much lower resistance than a standard conductor. The question is whether the cost of superconductors and their cooling systems (currently very high) outweigh the modest gain in transmission efficiency.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
What are most modern high temperature superconductors made of?
Resistance decreases with the decrease of temperature. Superconductors are made by lowering the temperature.
How superconductivity relates to ohm's law?
Ohm's law states that the current flowing through a conductor is directly proportional to the voltage applied across it and inversely proportional to its resistance. Superconductivity is a property observed in certain materials where they exhibit zero electrical resistance below a critical temperature. In superconductors, Ohm's law is not applicable as there is no resistance to impede the flow of current, resulting in the potential for an infinite current to flow in a closed circuit without needing a voltage difference.
The resistance of an extension cord varies directly with the length of the cord?
This means that as the length of the extension cord increases, the resistance also increases. Similarly, if the length decreases, the resistance will decrease as well. This relationship is described by the equation R = kL, where R is the resistance, L is the length, and k is a constant.
What is the relationship between wire size length of run and voltage drop?
The wire resistance is proportional to the length of wire divided by its cross-section area. The voltage drop is proportional to the resistance times the current.
Which material produces heat energy when current is passed through them?
Actually, ALL materials do ... at least, all materials that you're ever going to see outside of a laboratory or a stripped down MRI machine. The only exceptions are the so-called "superconductors", which have zero resistance and don't dissipate any electrical energy.
Which has the lowest resistance semiconductors superconductors insulator conductor?
superconductors, they have no resistance.
What do you call materials with the resistance of ohms?
superconductors
What materials don't have any resistance?
superconductors
Why need conductor resistance?
They don't. Look into superconductors.
What do you call materials with a resistance of 0 W?
superconductors
What are most modern high temperature superconductors made of?
Resistance decreases with the decrease of temperature. Superconductors are made by lowering the temperature.
What are properties of a superconductors what they are?
A normal conductor has resistance. A superconductor has no resistance. But to make superconductors a very low temperature is required. High-temperature supeconductors require a temperature of minus 203 degrees C, ordinary superconductors require substantially lower temperatures.
How are superconductors different from conductors?
In superconductors, no electricity is wasted because there is no resistance to the flow of electrons. In conductors any electricity not used, is wasted.
What is a material that has no electrical resistance?
The class of materials called superconductors have no DC resistance when cooled below their transition temperature. This temperature varies with the material and is below 20K for metallic superconductors and generally below about 100K for oxide or "High Temperature" superconductors
What is the term for the materials that have very low thermal energy resistance?
superconductors
What shows how conductors insulators superconductors and semiconductors rank in order of least resistance to most resistance?
The sequence is as follows:
What is the term for materials that have very low thermal and energy resistance?
superconductors
