Engineering Materials in EE
Which of the following gives materials in order of decreasing values of permeability?

 Silver, copper, aluminium, iron.
 Cobalt, nickel, aluminium, iron.
  Permalloy, nickel, air, water.
 Pure iron, silicon iron, aluminium, bismuth.

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Engineering Materials in EE
The Bohr model of the atom

 explained the color lines in the hydrogen spectrum.
All of these
 could not explain the line spectrum of atoms larger than hydrogen.
 had some made-up rules without explanations.

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