Asked in Science
What is a material that has no electrical resistance?
There are special materials called superconductors that exhibit zero electrical resistance, but this commonly requires cooling to very low temperatures. ...
Asked in Solid State Physics
Do the super conductors have real zero electrical resistance or is it a virtual one?
A superconductor truly has zero electrical resistance. It took scientists a half century to explain why, so this answer will omit the explanation of the effect. ...
Asked in Electricity and Magnetism
What is a substance with no electrical resistance?
The so-called "superconductors" have no electrical resistance. It's not just very low. It's precisely zero, such that a current can circulate in a loop of superconducting material for months without voltage and without any change in its magnitude. ...
How are the magnets able to have zero resistance?
If you mean zero electrical resistance for an electromagnet, this is possible with superconductivity. This can be achieved for certain materials at fairly low temperatures - typically a few kelvin. ...
When ohmmeter is zero?
It means you have effectively no resistance to current flow. Whether this is good or not depends on whether you WANT resistance to current flow. If you're testing a length of wire, a cable, or something like that, having your ohmmeter read zero would be good. If you're testing a motor or something else that needs to have resistance to work, having your ohmmeter read zero is bad and is called a Short Circuit. ...
Asked in Physics, Electrical Engineering
Which material has lowest resistivity?
A superconductor. It has zero resistance, and therefore zero resistivity. A superconductor. It has zero resistance, and therefore zero resistivity. A superconductor. It has zero resistance, and therefore zero resistivity. A superconductor. It has zero resistance, and therefore zero resistivity. ...
What happens to its resistance when an electrical device is heated?
That will depend on the temperature coefficient of resistance of the device, which could be positive (i.e. resistance increases with increasing temperature), negative (i.e. resistance decreases with increasing temperature), or zero (i.e. resistance is unaffected by temperature changes). ...
Asked in Science, World War 2
What has a low resistance?
Silver and gold both have low resistances. Superconductors have zero electrical resistance. People with acquired immune deficiency syndrome (AIDS) also have low resistance to infection. Many women have a low resistance to my charming and magnetic personality. ...
Asked in Computers, Electronics Engineering
When a multimeter is set to measure resistance what reading would you except when the probes are touching?
Something very close to zero. Only a superconductor will read zero resistance. ANSWER: Actually that is the first step to use when reading resistance to certify that the meter is indeed is calibrated since it will read zero. The reading will change due to the internal battery degradation with time by adjusting to zero reading that guarantee to a correct reading of resistance ...
What is time constant of capacitor when resistance is zero?
Time constant in an RC filter is resistance times capacitance. With ideal components, if the resistance is zero, then the time constant is zero, not mattter what the capacitance is. In a practical circuit, there is always some resistance in the conductors and in the capacitor so, if the resistance is (close to) zero, the time constant will be (close to) zero. ...
Asked in Physics
Where is the term zero used in physics?
In most cases, physics deals with finite quantities rather than zero, but zero does come up at times. The start of an event can be measured as zero hour. A superconductor has zero electrical resistance. There are doubtlessly other cases as well. Zero is a useful concept. ...
What would happen to circuit if there was no resistance?
a circuit with no resistance or zero resistance can be considered as open circuit in which the current is zero. without resistance the circuit just becomes open () ...
What is a short circuit how does it happen and why is it dangerous?
A short circuit is a circuit in which the connecting wires have different resistances.The electrons tend to flow from the shortest route through the wires which have the lowest resistance. Since the voltage is more than the resistance of the wire can control, the current flows very fast throgh the wires and heating the low resistance wires and eventually burning them up. This can be explained mathematically using Ohm's Law. Ohm's Law describe the relation between electrical current, electrical potential difference(i.e. voltage), and...
What a substance with least amount of resistance?
There are several substances that have zero electrical resistance. Those are known by the generic name of "superconductors". So far, superconduction has only been observed at cryogenic (i.e., "supercold") temperatures. ...
Asked in Electricity and Magnetism, Chemistry
Is gold the best electrical conductor?
No, gold is not the best conductor. At room temperature, silver is a slightly better conductor. The best electrical conductors are the so-called superconductors, which are materials that only exhibit the property of superconductivity at very low (cryogenic) temperatures. When exhibiting the property of superconductivity, they have a resistance of zero. ...