In the given circuit, Resistance R is made up of type-I superconducting material with transition temperature T(adsbygoogle = window.adsbygoogle || []).push({}); _{c}. The initial temperature of the circuit is T(>T_{c}). At time t=t_{0}the temperature is dropped below T_{c}. Find the current in the circuit at:

1] at t<t_{0}and through AB

2] at t=t_{0}

3] at t>t_{0}

My answer:

When the temperature is above the critical temperature, the circuit behaves normally. When the temperature is dropped below the crictical temperature, the resistance becomes R=0 and you get a persistent current. My problem is, I don't know what happens to the capacitor in the circuit once the temperature falls below T_{c}. Explanation needed...

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# Homework Help: Superconducting resistive material

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