Mr Kamath, the chief mechanical engineer in Northern railways went to Tokyo to attend a seminar on fast moving trains. His friend Mr. Hiroki explained how Japnese people are concentrating on energy conservation and saving fossil fuels using maglev trains. Mr. Kamath travelled from Tokyo to Osaka in maglev train and found that the sound is less, travel is smooth and understood the Japanese technology in mass transporting system. Maglev trains work on the principle of Meissner's effect.
(a) Mention two values which Mr Kamath found in Mr. Hiorki.
(b) Which values in Mr Kamath do you appreciate ?
(c) What is Meissner's effect ? Write the value of magnetic permebility for perfect diamagnetism.

Explanation

(a) Mr. Kamath found that Mr Hiroki is friendly to the environment and a good narrator.
(b) Mr. Kamath exhibits learning attitude and appreciation of eco-friendly behaviour.
(c) A conductor, when cooled below the transition temperature `T_(c)` in a uniform magnetic field pushes away the magnetic field lines as if no magnetic field exists inside the conductor. This phenomena is
Meissner effect. Magnetic field Induction B within the sample is more than the magnetic field intensity, i.e., `B gt H or (B)/(H) gt 1, or mu gt 1`