WBUT 2012 PHYSICS-II [PH-401] Question Paper

CS/B.TECH(ECE-New/PWE-New)/SEM-4/PH-401/2012

2012

PHYSICS-II

Time Allotted : 3 Hours                                    Full Marks : 70

The figures in the margin indicate full marks.

Candidates are required to give their answers in their own words

as far as practicable.

GROUP – A

(Multiple Choice Type Question)

1.       Choose the correct alternatives for any ten of the following:
                                                                                               10 x 1 = 10

          i)        The dimension of μ0t0  is

                   a)       L-2 T-2                                      b)       L-2 T2

                   c)       L T-1                                          d)       L-1 T-1

          ii)       The displacement current arises due to

                   a)       positive charge only

                   b)       negative charge only

                   c)       time varying electric field

                   d)       magnetic monopole

          iii)      If the Fermi energy of metal ( in 3d ) at thermal equilibrium             is 15 eV, then the average energy of the electron is

                   a)       9 eV                                         b)       10 eV

                   c)       15 eV                                       d)       12 eV