GATE PH Question Paper Answers 2015 Download PDF

GATE Physics (PH) Previous Year Question Paper 2015

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GATE Physics (PH) Question Papers 2015

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GATE Physics (PH) Question Paper 2015 Download PDF File:

1. In Bose-Einstein condensates, the particles

  • (A) have strong interparticle attraction
  • (B) condense in real space
  • (C) have overlapping wavefuntions
  • (D) have large and positive chemical potential

2. For a black body radiation in a cavity, photons are created and annihilated freely as a result of emission and absorption by the walls of the cavity. This is because

  • (A) the chemical potential of the photons is zero
  • (B) photons obey Pauli exclusion principle
  • (C) photons are spin-1 particles
  • (D) the entropy of the photons is very large

3. A point charge is placed between two semi-infinite conducting plates which are inclined at an angle of 30o with respect to each other. The number of image charges is ______________

4. The lattice parameters a, b, c of an orthorhombic crystal are related by abc  2 3  . In units of a, the interplanar separation between the (110) planes is __________ (upto three decimal places)

5. The mean kinetic energy of a nucleon in a nucleus of atomic weight A varies as An, where n is ______________ (upto two decimal places)

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