**Parallel Connection of Superconductors**

When two superconductors are connected in parallel, the net resistance of the combination is zero. This is because superconductors have the unique property of zero electrical resistance when they are below their critical temperature. As a result, the current flows through the superconductors without experiencing any resistance.

**Explanation:**

1. **Superconductivity:** Superconductivity is a phenomenon in which certain materials exhibit zero electrical resistance when cooled below a critical temperature. This critical temperature varies depending on the material, but it is typically very low, often close to absolute zero (−273.15°C or −459.67°F).

2. **Zero Resistance:** When a superconductor is below its critical temperature, it allows the flow of electric current without any hindrance. This is due to the absence of collisions between the electrons and the lattice structure of the material, which typically cause resistance in normal conductors.

3. **Parallel Connection:** When two superconductors are connected in parallel, they behave as separate paths for the current to flow. Since each superconductor has zero resistance, the total resistance of the combination is also zero.

4. **Kirchhoff's Laws:** According to Kirchhoff's laws, when resistors are connected in parallel, the total resistance is given by the formula:

1/R(total) = 1/R1 + 1/R2 + ...

However, in the case of superconductors, where the resistance is zero, the reciprocal of zero is infinity. Therefore, the formula becomes:

1/R(total) = 1/∞ + 1/∞ + ...

The sum of infinite reciprocals of infinity is still zero.

5. **Consequences:** The absence of resistance implies that no energy is lost in the form of heat during the flow of current in the superconductors. This has numerous practical applications, such as in power transmission lines, MRI machines, particle accelerators, and more.

6. **Conditions for Superconductivity:** It is important to note that superconductivity only occurs at very low temperatures. If the temperature rises above the critical temperature of a superconductor, it loses its superconducting properties and behaves like a normal conductor with resistance.

7. **Limitations of Superconductors:** While superconductors have many advantages, they also have limitations. Superconductivity requires extremely low temperatures, which can be expensive and challenging to achieve. Additionally, superconductors are often brittle and can be damaged easily, making them less practical for some applications.

In conclusion, when two superconductors are connected in parallel, their net resistance is zero. This is because superconductors exhibit zero resistance when they are below their critical temperature. The absence of resistance allows the current to flow without any hindrance, resulting in efficient electrical transmission.