Questions tagged [superconductors]

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Can a 'superconductor battery' , theoretically at least, last forever? Even if it is being used? [closed]

One of the amazing 'killer apps' of a cheap, non-toxic, high-temperature superconductor is storing electrical energy in a large current that loops around indefinitely. If this could be scaled down, it ...
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How would superconducting circuits save a lot of power in a small electric car?

From the bottom of the New Scientist article called , 'The superconductor breakthrough that could mean an energy revolution.': Something like 10 per cent of electrical power is lost in long-distance, ...
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Why can't superconducting inductors be used in LC filter design?

If I replace the copper wire of the coil with superconducting material, what will be the effect on the design of the passive LC filter?why superconducting cant design?
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How can electrons flow through superconductive material

I am a little confused. Metals has enormous number of free electrons but low carrier mobility. It means that electrons are moving slowly but large amount simultaneously. Lets say you pass current ...
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120 views

Superconductors vs Ideal conductors

I have always assumed superconductors and ideal conductors as the same thing, but recently I found out that they are not. I tried to look up their differences on the internet, but I got only mixed up ...
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SQUID made of a Josephson Junction in parallel with two Josephson Junctions in series

Suppose I have a Josephson Junction (JJ) in parallel with two JJs in series. If I have a voltage bias as in the diagram below. First by flux quantization conditions I will get that $$ \varphi_1 - \...
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122 views

How do superconductors avoid breaking Kirchoff's Voltage Law?

So, let's imagine that you've got a superconductive voltage source (e.g. a wind turbine) hooked up to a loop of superconductive wire to form a circuit. Kirchoff's Voltage Law states that the sum of ...
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74 views

For superconducting inductors, does the “magnetic current” flowing in the ferrite of an inductor suffer from “magnetic resistance”?

In this answer to "Inductor made out of super conductors", the experiences recounted included "ramping up the inductor" or "charging it up". Absolutely fascinating is ...
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3answers
670 views

Inductor made out of super conductors

I have been thinking about an inductor made out of superconductors, would it work? How would it affect the total inductance compared to a normal inductor? Would it be possible to calculate such a ...
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1answer
34 views

How would a NOT gate be implemented by Josephson Junctions

I'm interested in learning how Josephson Junctions can be utilized to create invertible logic gates. To me it's not clear how the Junctions provide any logical capability (they simply allow for a ...
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Real Power or Reactive Power in Superconducting Motors?

My circuits class is teaching that in AC power, there are two kinds of loads. One is a resistive load, with absorbs power at all times. The other is a reactive load, which absorbs zero average power. ...
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178 views

What happens to a computer as it is cooled towards absolute zero?

What happens to the behavior of a conventional circuit using conventional components as it is cooled towards absolute zero? To make this question more relatable: What would happen as we cool a modern ...
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1answer
153 views

Josephson Junctions: Difference between X and X enclosed by box (☒), in circuit diagrams?

In circuit diagrams, Josephson Junctions are sometimes given as an X and sometimes as an X with a box around it . What is the ...
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1answer
311 views

When high frequency current goes through a superconductor, does it still radiate off like it would with copper?

I've been thinking about the skin effect and that got me thinking: When high frequency current goes through a superconductor, does it still radiate off like it would with copper?
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309 views

Does the formula v=Ldi/dt apply to materials with zero resistence, such as superconductors?

I've been trying to find information about the formula \$ v = L \cdot \frac{di}{dt} \$, it seem to have something to do with voltage drop, and I know voltage drop is caused by resistance, so would a ...
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What will be the behaviour of superconductors if they are used as core or coil?

Superconductors are strong diamagnetic in nature so if they are used as core of any coil do magnetic lines of forces pass through them – I mean inside them just as with a soft iron core? Secondly if ...
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106 views

What is the most available high-temp superconductor for samples and study?

I could only find one named Amperium on the web, but not on the eBay or any little shops. It is very interesting material with conductivity 40 times better than copper. Is it possible to buy anywhere ...