Question : Which of the following was the first theory of superconductivity?
Option 1: Ginzburg-Landau theory
Option 2: London theory
Option 3: Resonating valence bond theory
Option 4: Quantum field theory
Correct Answer: London theory
Solution : The correct answer is the London theory.
London theory was the first phenomenological explanation of superconductivity. It was proposed in 1935, not long after the brothers Fritz and Heinz London learned that superconductors emit magnetic fields. The Meissner effect, wherein a material exponentially expels all internal magnetic fields when it reaches the superconducting threshold, may be explained by the equations of this theory, which is a significant achievement.
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Question : Which of the following intermolecular forces is also called a London force?
Option 1: Dispersion forces
Option 2: Dipole-induced dipole forces
Option 3: Dipole-dipole forces
Option 4: Hydrogen bond forces
Question : The twin paradox is associated with:
Option 1: The theory of relativity
Option 2: Particle physics
Option 3: Hydrodynamics
Option 4: Quantum mechanics
Question : Name the physicist who was awarded Nobel prize for Quantum Theory in 1918.
Option 1: Max Puluak
Option 2: Niels Bohr
Option 3: Max Planck
Option 4: Burry
Question : Which of the following statements is correct?
Option 1: The first Lok Sabha was constituted in 1952.
Option 2: The first Lok Sabha was constituted in 1947.
Option 3: The first Lok Sabha was constituted in 1950
Option 4: The first Lok Sabha was constituted in 1948
Question : Which of the following principles is used to produce 'low temperatures'?
Option 1: Superconductivity
Option 2: Joule-Kelvin effect
Option 3: Thermo-electric effect
Option 4: Adiabatic demagnetisation
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